20312809974 has 12 divisors (see below), whose sum is σ = 44011088316. Its totient is φ = 6770936652.

The previous prime is 20312809969. The next prime is 20312809991. The reversal of 20312809974 is 47990821302.

It is a super-2 number, since 2×20312809974² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564244704 + ... + 564244739.

It is an arithmetic number, because the mean of its divisors is an integer number (3667590693).

Almost surely, 2^20312809974 is an apocalyptic number.

20312809974 is an abundant number, since it is smaller than the sum of its proper divisors (23698278342).

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

20312809974 is a wasteful number, since it uses less digits than its factorization.

20312809974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128489451 (or 1128489448 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20312809974 in words is "twenty billion, three hundred twelve million, eight hundred nine thousand, nine hundred seventy-four".