18430874931 has 16 divisors (see below), whose sum is σ = 29563308800. Its totient is φ = 9977616288.

The previous prime is 18430874911. The next prime is 18430874939. The reversal of 18430874931 is 13947803481.

It is a happy number.

It is not a de Polignac number, because 18430874931 - 2⁶ = 18430874867 is a prime.

It is a super-2 number, since 2×18430874931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18430874939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23095936 + ... + 23096733.

It is an arithmetic number, because the mean of its divisors is an integer number (1847706800).

Almost surely, 2^18430874931 is an apocalyptic number.

18430874931 is a deficient number, since it is larger than the sum of its proper divisors (11132433869).

18430874931 is a wasteful number, since it uses less digits than its factorization.

18430874931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46192698.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18430874931 in words is "eighteen billion, four hundred thirty million, eight hundred seventy-four thousand, nine hundred thirty-one".