21296496431 has 4 divisors (see below), whose sum is σ = 24338853072. Its totient is φ = 18254139792.

The previous prime is 21296496383. The next prime is 21296496449. The reversal of 21296496431 is 13469469212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21296496431 - 2⁶ = 21296496367 is a prime.

It is a super-2 number, since 2×21296496431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21296496451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521178310 + ... + 1521178323.

It is an arithmetic number, because the mean of its divisors is an integer number (6084713268).

Almost surely, 2^21296496431 is an apocalyptic number.

21296496431 is a deficient number, since it is larger than the sum of its proper divisors (3042356641).

21296496431 is an equidigital number, since it uses as much as digits as its factorization.

21296496431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042356640.

The product of its digits is 559872, while the sum is 47.

The spelling of 21296496431 in words is "twenty-one billion, two hundred ninety-six million, four hundred ninety-six thousand, four hundred thirty-one".