18696820688 has 160 divisors (see below), whose sum is σ = 46182377472. Its totient is φ = 7133184000.

The previous prime is 18696820679. The next prime is 18696820739. The reversal of 18696820688 is 88602869681.

It is a super-2 number, since 2×18696820688² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a self number, because there is not a number n which added to its sum of digits gives 18696820688.

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, 18099020 + ... + 18100052.

Almost surely, 2^18696820688 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 18696820688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23091188736).

18696820688 is an abundant number, since it is smaller than the sum of its proper divisors (27485556784).

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

18696820688 is a wasteful number, since it uses less digits than its factorization.

18696820688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 62.

The spelling of 18696820688 in words is "eighteen billion, six hundred ninety-six million, eight hundred twenty thousand, six hundred eighty-eight".