18450012252 has 48 divisors (see below), whose sum is σ = 49217333760. Its totient is φ = 5269578432.

The previous prime is 18450012221. The next prime is 18450012253. The reversal of 18450012252 is 25221005481.

It is a super-2 number, since 2×18450012252² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18450012253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 211249 + ... + 285527.

It is an arithmetic number, because the mean of its divisors is an integer number (1025361120).

Almost surely, 2^18450012252 is an apocalyptic number.

18450012252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18450012252 is an abundant number, since it is smaller than the sum of its proper divisors (30767321508).

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

18450012252 is a wasteful number, since it uses less digits than its factorization.

18450012252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77250 (or 77248 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The spelling of 18450012252 in words is "eighteen billion, four hundred fifty million, twelve thousand, two hundred fifty-two".