18747836225 has 12 divisors (see below), whose sum is σ = 23253035520. Its totient is φ = 14994579600.

The previous prime is 18747836209. The next prime is 18747836243. The reversal of 18747836225 is 52263874781.

It is not a de Polignac number, because 18747836225 - 2⁴ = 18747836209 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13820 + ... + 194130.

It is an arithmetic number, because the mean of its divisors is an integer number (1937752960).

Almost surely, 2^18747836225 is an apocalyptic number.

It is an amenable number.

18747836225 is a deficient number, since it is larger than the sum of its proper divisors (4505199295).

18747836225 is a wasteful number, since it uses less digits than its factorization.

18747836225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184480 (or 184475 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 53.

The spelling of 18747836225 in words is "eighteen billion, seven hundred forty-seven million, eight hundred thirty-six thousand, two hundred twenty-five".