31202020000020 has 24 divisors (see below), whose sum is σ = 87365656000224. Its totient is φ = 8320538666656.

The previous prime is 31202020000007. The next prime is 31202020000027. The reversal of 31202020000020 is 2000002020213.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 31202019999960 and 31202020000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202020000027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260016833274 + ... + 260016833393.

It is an arithmetic number, because the mean of its divisors is an integer number (3640235666676).

Almost surely, 2^{31202020000020} is an apocalyptic number.

31202020000020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31202020000020 is an abundant number, since it is smaller than the sum of its proper divisors (56163636000204).

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

31202020000020 is a wasteful number, since it uses less digits than its factorization.

31202020000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520033666679 (or 520033666677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 31202020000020 its reverse (2000002020213), we get a palindrome (33202022020233).

The spelling of 31202020000020 in words is "thirty-one trillion, two hundred two billion, twenty million, twenty", and thus it is an aban number.