20431511012 has 12 divisors (see below), whose sum is σ = 39005612016. Its totient is φ = 9287050440.

The previous prime is 20431510991. The next prime is 20431511039. The reversal of 20431511012 is 21011513402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232176218 + ... + 232176305.

It is an arithmetic number, because the mean of its divisors is an integer number (3250467668).

Almost surely, 2^20431511012 is an apocalyptic number.

20431511012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20431511012 is a deficient number, since it is larger than the sum of its proper divisors (18574101004).

20431511012 is a wasteful number, since it uses less digits than its factorization.

20431511012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464352538 (or 464352536 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 20431511012 in words is "twenty billion, four hundred thirty-one million, five hundred eleven thousand, twelve".