18232967431 has 4 divisors (see below), whose sum is σ = 20837677072. Its totient is φ = 15628257792.

The previous prime is 18232967393. The next prime is 18232967437. The reversal of 18232967431 is 13476923281.

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

It is not a de Polignac number, because 18232967431 - 2¹⁹ = 18232443143 is a prime.

It is a super-2 number, since 2×18232967431² (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 (18232967437) 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, 1302354810 + ... + 1302354823.

It is an arithmetic number, because the mean of its divisors is an integer number (5209419268).

Almost surely, 2^18232967431 is an apocalyptic number.

18232967431 is a deficient number, since it is larger than the sum of its proper divisors (2604709641).

18232967431 is an equidigital number, since it uses as much as digits as its factorization.

18232967431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604709640.

The product of its digits is 435456, while the sum is 46.

The spelling of 18232967431 in words is "eighteen billion, two hundred thirty-two million, nine hundred sixty-seven thousand, four hundred thirty-one".