202002100020 has 96 divisors (see below), whose sum is σ = 718229702400. Its totient is φ = 46171907712.

The previous prime is 202002100009. The next prime is 202002100031. The reversal of 202002100020 is 20001200202.

It is an interprime number because it is at equal distance from previous prime (202002100009) and next prime (202002100031).

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 = 202002099975 and 202002100011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26716075 + ... + 26723634.

It is an arithmetic number, because the mean of its divisors is an integer number (7481559400).

Almost surely, 2^202002100020 is an apocalyptic number.

202002100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202002100020 is an abundant number, since it is smaller than the sum of its proper divisors (516227602380).

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

202002100020 is a wasteful number, since it uses less digits than its factorization.

202002100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53439734 (or 53439726 counting only the distinct ones).

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

Adding to 202002100020 its reverse (20001200202), we get a palindrome (222003300222).

The spelling of 202002100020 in words is "two hundred two billion, two million, one hundred thousand, twenty".