18520074100 has 36 divisors (see below), whose sum is σ = 43842068928. Its totient is φ = 6734572000.

The previous prime is 18520074061. The next prime is 18520074113. The reversal of 18520074100 is 147002581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8417116 + ... + 8419315.

It is an arithmetic number, because the mean of its divisors is an integer number (1217835248).

Almost surely, 2^18520074100 is an apocalyptic number.

18520074100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520074100 is an abundant number, since it is smaller than the sum of its proper divisors (25321994828).

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

18520074100 is a wasteful number, since it uses less digits than its factorization.

18520074100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16836456 (or 16836449 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 18520074100 its reverse (147002581), we get a palindrome (18667076681).

The spelling of 18520074100 in words is "eighteen billion, five hundred twenty million, seventy-four thousand, one hundred".