18185976252 has 24 divisors (see below), whose sum is σ = 47148827600. Its totient is φ = 6061992048.

The previous prime is 18185976239. The next prime is 18185976257. The reversal of 18185976252 is 25267958181.

18185976252 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 5 + 9 + 7 + 625 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18185976257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84194227 + ... + 84194442.

Almost surely, 2^18185976252 is an apocalyptic number.

18185976252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18185976252 is an abundant number, since it is smaller than the sum of its proper divisors (28962851348).

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

18185976252 is a wasteful number, since it uses less digits than its factorization.

18185976252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168388682 (or 168388674 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The spelling of 18185976252 in words is "eighteen billion, one hundred eighty-five million, nine hundred seventy-six thousand, two hundred fifty-two".