20431523512 has 32 divisors (see below), whose sum is σ = 38706025680. Its totient is φ = 10110009600.

The previous prime is 20431523509. The next prime is 20431523513. The reversal of 20431523512 is 21532513402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431523513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381743 + ... + 2390305.

Almost surely, 2^20431523512 is an apocalyptic number.

It is an amenable number.

20431523512 is a deficient number, since it is larger than the sum of its proper divisors (18274502168).

20431523512 is a wasteful number, since it uses less digits than its factorization.

20431523512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11623 (or 11619 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20431523512 in words is "twenty billion, four hundred thirty-one million, five hundred twenty-three thousand, five hundred twelve".