18518295252 has 24 divisors (see below), whose sum is σ = 43216486432. Its totient is φ = 6171746400.

The previous prime is 18518295203. The next prime is 18518295287. The reversal of 18518295252 is 25259281581.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 49699 + ... + 198762.

Almost surely, 2^18518295252 is an apocalyptic number.

18518295252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18518295252 is an abundant number, since it is smaller than the sum of its proper divisors (24698191180).

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

18518295252 is a wasteful number, since it uses less digits than its factorization.

18518295252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254679 (or 254677 counting only the distinct ones).

The product of its digits is 576000, while the sum is 48.

The spelling of 18518295252 in words is "eighteen billion, five hundred eighteen million, two hundred ninety-five thousand, two hundred fifty-two".