20200020 has 24 divisors (see below), whose sum is σ = 56560224. Its totient is φ = 5386656.

The previous prime is 20200013. The next prime is 20200027. The reversal of 20200020 is 2000202.

It is an interprime number because it is at equal distance from previous prime (20200013) and next prime (20200027).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 20199981 and 20200008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168274 + ... + 168393.

It is an arithmetic number, because the mean of its divisors is an integer number (2356676).

Almost surely, 2^20200020 is an apocalyptic number.

20200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20200020 is an abundant number, since it is smaller than the sum of its proper divisors (36360204).

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

20200020 is a wasteful number, since it uses less digits than its factorization.

20200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336679 (or 336677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 6.

The square root of 20200020 is about 4494.4432358191. The cubic root of 20200020 is about 272.3436580392.

Adding to 20200020 its reverse (2000202), we get a palindrome (22200222).

The spelling of 20200020 in words is "twenty million, two hundred thousand, twenty".