20231397909768 has 16 divisors (see below), whose sum is σ = 50578494774480. Its totient is φ = 6743799303248.

The previous prime is 20231397909721. The next prime is 20231397909769. The reversal of 20231397909768 is 86790979313202.

It is a super-2 number, since 2×20231397909768² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20231397909699 and 20231397909708.

It is not an unprimeable number, because it can be changed into a prime (20231397909769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421487456430 + ... + 421487456477.

It is an arithmetic number, because the mean of its divisors is an integer number (3161155923405).

Almost surely, 2^{20231397909768} is an apocalyptic number.

It is an amenable number.

20231397909768 is an abundant number, since it is smaller than the sum of its proper divisors (30347096864712).

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

20231397909768 is a wasteful number, since it uses less digits than its factorization.

20231397909768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842974912916 (or 842974912912 counting only the distinct ones).

The product of its (nonzero) digits is 61725888, while the sum is 66.

The spelling of 20231397909768 in words is "twenty trillion, two hundred thirty-one billion, three hundred ninety-seven million, nine hundred nine thousand, seven hundred sixty-eight".