20431324715 has 16 divisors (see below), whose sum is σ = 24973469472. Its totient is φ = 16042904064.

The previous prime is 20431324681. The next prime is 20431324751. The reversal of 20431324715 is 51742313402.

It is a cyclic number.

It is not a de Polignac number, because 20431324715 - 2¹² = 20431320619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17294 + ... + 202883.

It is an arithmetic number, because the mean of its divisors is an integer number (1560841842).

Almost surely, 2^20431324715 is an apocalyptic number.

20431324715 is a deficient number, since it is larger than the sum of its proper divisors (4542144757).

20431324715 is a wasteful number, since it uses less digits than its factorization.

20431324715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220526.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 20431324715 in words is "twenty billion, four hundred thirty-one million, three hundred twenty-four thousand, seven hundred fifteen".