202002001020 has 72 divisors (see below), whose sum is σ = 612997834176. Its totient is φ = 53844481152.

The previous prime is 202002000947. The next prime is 202002001043. The reversal of 202002001020 is 20100200202.

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 = 202002000993 and 202002001011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193474 + ... + 664406.

It is an arithmetic number, because the mean of its divisors is an integer number (8513858808).

Almost surely, 2^202002001020 is an apocalyptic number.

202002001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202002001020 is an abundant number, since it is smaller than the sum of its proper divisors (410995833156).

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

202002001020 is a wasteful number, since it uses less digits than its factorization.

202002001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473331 (or 473326 counting only the distinct ones).

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

Adding to 202002001020 its reverse (20100200202), we get a palindrome (222102201222).

The spelling of 202002001020 in words is "two hundred two billion, two million, one thousand, twenty".