18522652820 has 96 divisors (see below), whose sum is σ = 45898997760. Its totient is φ = 6146703360.

The previous prime is 18522652817. The next prime is 18522652879. The reversal of 18522652820 is 2825622581.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 716276 + ... + 741684.

It is an arithmetic number, because the mean of its divisors is an integer number (478114560).

Almost surely, 2^18522652820 is an apocalyptic number.

18522652820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18522652820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22949498880).

18522652820 is an abundant number, since it is smaller than the sum of its proper divisors (27376344940).

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

18522652820 is a wasteful number, since it uses less digits than its factorization.

18522652820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25593 (or 25591 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 18522652820 in words is "eighteen billion, five hundred twenty-two million, six hundred fifty-two thousand, eight hundred twenty".