18242580852 has 18 divisors (see below), whose sum is σ = 46113190578. Its totient is φ = 6080860272.

The previous prime is 18242580809. The next prime is 18242580857. The reversal of 18242580852 is 25808524281.

18242580852 is a `hidden beast` number, since 18 + 2 + 4 + 2 + 580 + 8 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17740641636 + 501939216 = 133194^2 + 22404^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×18242580852² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18242580798 and 18242580807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242580857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253369143 + ... + 253369214.

It is an arithmetic number, because the mean of its divisors is an integer number (2561843921).

Almost surely, 2^18242580852 is an apocalyptic number.

18242580852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18242580852 is an abundant number, since it is smaller than the sum of its proper divisors (27870609726).

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

18242580852 is a wasteful number, since it uses less digits than its factorization.

18242580852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506738367 (or 506738362 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 45.

The spelling of 18242580852 in words is "eighteen billion, two hundred forty-two million, five hundred eighty thousand, eight hundred fifty-two".