1202002020 has 36 divisors (see below), whose sum is σ = 3646073340. Its totient is φ = 320533824.

The previous prime is 1202002007. The next prime is 1202002033. The reversal of 1202002020 is 202002021.

It is an interprime number because it is at equal distance from previous prime (1202002007) and next prime (1202002033).

It can be written as a sum of positive squares in 2 ways, for example, as 368409636 + 833592384 = 19194^2 + 28872^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1202001993 and 1202002011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3338715 + ... + 3339074.

It is an arithmetic number, because the mean of its divisors is an integer number (101279815).

Almost surely, 2^1202002020 is an apocalyptic number.

1202002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202002020 is an abundant number, since it is smaller than the sum of its proper divisors (2444071320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1202002020 is a wasteful number, since it uses less digits than its factorization.

1202002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677804 (or 6677799 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1202002020 is about 34669.9007786293. The cubic root of 1202002020 is about 1063.2492029843.

Adding to 1202002020 its reverse (202002021), we get a palindrome (1404004041).

Subtracting from 1202002020 its reverse (202002021), we obtain a palindrome (999999999).

The spelling of 1202002020 in words is "one billion, two hundred two million, two thousand, twenty".