18720625716 has 144 divisors (see below), whose sum is σ = 52972920000. Its totient is φ = 5746712832.

The previous prime is 18720625699. The next prime is 18720625723. The reversal of 18720625716 is 61752602781.

18720625716 is a `hidden beast` number, since 1 + 8 + 7 + 2 + 0 + 625 + 7 + 16 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6303880 + ... + 6306848.

It is an arithmetic number, because the mean of its divisors is an integer number (367867500).

Almost surely, 2^18720625716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18720625716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26486460000).

18720625716 is an abundant number, since it is smaller than the sum of its proper divisors (34252294284).

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

18720625716 is a wasteful number, since it uses less digits than its factorization.

18720625716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 3486 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 18720625716 in words is "eighteen billion, seven hundred twenty million, six hundred twenty-five thousand, seven hundred sixteen".