18644984470 has 32 divisors (see below), whose sum is σ = 39247388928. Its totient is φ = 6243900768.

The previous prime is 18644984363. The next prime is 18644984483. The reversal of 18644984470 is 7448944681.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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, 3094164 + ... + 3100183.

It is an arithmetic number, because the mean of its divisors is an integer number (1226480904).

Almost surely, 2^18644984470 is an apocalyptic number.

18644984470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18644984470 is an abundant number, since it is smaller than the sum of its proper divisors (20602404458).

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

18644984470 is a wasteful number, since it uses less digits than its factorization.

18644984470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194404.

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 18644984470 in words is "eighteen billion, six hundred forty-four million, nine hundred eighty-four thousand, four hundred seventy".