18520506716 has 12 divisors (see below), whose sum is σ = 33201396480. Its totient is φ = 9034393440.

The previous prime is 18520506689. The next prime is 18520506733. The reversal of 18520506716 is 61760502581.

It is a super-2 number, since 2×18520506716² (a number of 21 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 56464796 + ... + 56465123.

It is an arithmetic number, because the mean of its divisors is an integer number (2766783040).

Almost surely, 2^18520506716 is an apocalyptic number.

It is an amenable number.

18520506716 is a deficient number, since it is larger than the sum of its proper divisors (14680889764).

18520506716 is a wasteful number, since it uses less digits than its factorization.

18520506716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112929964 (or 112929962 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 18520506716 in words is "eighteen billion, five hundred twenty million, five hundred six thousand, seven hundred sixteen".