18472639306 has 24 divisors (see below), whose sum is σ = 31902647904. Its totient is φ = 7954721640.

The previous prime is 18472639291. The next prime is 18472639307. The reversal of 18472639306 is 60393627481.

It is a self number, because there is not a number n which added to its sum of digits gives 18472639306.

It is not an unprimeable number, because it can be changed into a prime (18472639307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1155030 + ... + 1170913.

It is an arithmetic number, because the mean of its divisors is an integer number (1329276996).

Almost surely, 2^18472639306 is an apocalyptic number.

18472639306 is a deficient number, since it is larger than the sum of its proper divisors (13430008598).

18472639306 is a wasteful number, since it uses less digits than its factorization.

18472639306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325994 (or 2325975 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 18472639306 in words is "eighteen billion, four hundred seventy-two million, six hundred thirty-nine thousand, three hundred six".