18645473706 has 16 divisors (see below), whose sum is σ = 37428555648. Its totient is φ = 6192223200.

The previous prime is 18645473689. The next prime is 18645473713. The reversal of 18645473706 is 60737454681.

It is a happy number.

It is a super-2 number, since 2×18645473706² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5731915 + ... + 5735166.

It is an arithmetic number, because the mean of its divisors is an integer number (2339284728).

Almost surely, 2^18645473706 is an apocalyptic number.

18645473706 is an abundant number, since it is smaller than the sum of its proper divisors (18783081942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18645473706 is a wasteful number, since it uses less digits than its factorization.

18645473706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467357.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 18645473706 in words is "eighteen billion, six hundred forty-five million, four hundred seventy-three thousand, seven hundred six".