18920256696 has 160 divisors (see below), whose sum is σ = 60855062400. Its totient is φ = 5431613760.

The previous prime is 18920256689. The next prime is 18920256701. The reversal of 18920256696 is 69665202981.

It is a happy number.

It is a super-2 number, since 2×18920256696² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 65581 + ... + 205283.

It is an arithmetic number, because the mean of its divisors is an integer number (380344140).

Almost surely, 2^18920256696 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 18920256696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30427531200).

18920256696 is an abundant number, since it is smaller than the sum of its proper divisors (41934805704).

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

18920256696 is a wasteful number, since it uses less digits than its factorization.

18920256696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139751 (or 139738 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 18920256696 in words is "eighteen billion, nine hundred twenty million, two hundred fifty-six thousand, six hundred ninety-six".