18523323016 has 32 divisors (see below), whose sum is σ = 37913767200. Its totient is φ = 8414103040.

The previous prime is 18523323001. The next prime is 18523323043. The reversal of 18523323016 is 61032332581.

It is a super-2 number, since 2×18523323016² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64920 + ... + 203128.

It is an arithmetic number, because the mean of its divisors is an integer number (1184805225).

Almost surely, 2^18523323016 is an apocalyptic number.

It is an amenable number.

18523323016 is an abundant number, since it is smaller than the sum of its proper divisors (19390444184).

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

18523323016 is a wasteful number, since it uses less digits than its factorization.

18523323016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139749 (or 139745 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 18523323016 its reverse (61032332581), we get a palindrome (79555655597).

The spelling of 18523323016 in words is "eighteen billion, five hundred twenty-three million, three hundred twenty-three thousand, sixteen".