1000022002020 has 72 divisors (see below), whose sum is σ = 3061229491320. Its totient is φ = 264225991680.

The previous prime is 1000022001989. The next prime is 1000022002027. The reversal of 1000022002020 is 202002200001.

It can be written as a sum of positive squares in 4 ways, for example, as 7324621056 + 992697380964 = 85584^2 + 996342^2 .

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 = 1000022001993 and 1000022002011.

It is not an unprimeable number, because it can be changed into a prime (1000022002027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25465141 + ... + 25504380.

Almost surely, 2^{1000022002020} is an apocalyptic number.

1000022002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000022002020 is an abundant number, since it is smaller than the sum of its proper divisors (2061207489300).

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

1000022002020 is a wasteful number, since it uses less digits than its factorization.

1000022002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50969645 (or 50969640 counting only the distinct ones).

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

Adding to 1000022002020 its reverse (202002200001), we get a palindrome (1202024202021).

The spelling of 1000022002020 in words is "one trillion, twenty-two million, two thousand, twenty".