20310121056420 has 72 divisors (see below), whose sum is σ = 66346395458616. Its totient is φ = 4999414413312.

The previous prime is 20310121056419. The next prime is 20310121056431. The reversal of 20310121056420 is 2465012101302.

20310121056420 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 0 + 1 + 2 + 10 + 5 + 642 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1026359452836 + 19283761603584 = 1013094^2 + 4391328^2 .

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, 4339767117 + ... + 4339771796.

It is an arithmetic number, because the mean of its divisors is an integer number (921477714703).

Almost surely, 2^{20310121056420} is an apocalyptic number.

20310121056420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310121056420 is an abundant number, since it is smaller than the sum of its proper divisors (46036274402196).

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

20310121056420 is a wasteful number, since it uses less digits than its factorization.

20310121056420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679538941 (or 8679538936 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 20310121056420 its reverse (2465012101302), we get a palindrome (22775133157722).

The spelling of 20310121056420 in words is "twenty trillion, three hundred ten billion, one hundred twenty-one million, fifty-six thousand, four hundred twenty".