20312111402400 has 72 divisors (see below), whose sum is σ = 66115922622624. Its totient is φ = 5416563040000.

The previous prime is 20312111402383. The next prime is 20312111402431. The reversal of 20312111402400 is 420411121302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4231687476 + ... + 4231692275.

It is an arithmetic number, because the mean of its divisors is an integer number (918276703092).

Almost surely, 2^{20312111402400} is an apocalyptic number.

20312111402400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312111402400 is an abundant number, since it is smaller than the sum of its proper divisors (45803811220224).

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

20312111402400 is a wasteful number, since it uses less digits than its factorization.

20312111402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463379774 (or 8463379761 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20312111402400 its reverse (420411121302), we get a palindrome (20732522523702).

The spelling of 20312111402400 in words is "twenty trillion, three hundred twelve billion, one hundred eleven million, four hundred two thousand, four hundred".