18988799696 has 40 divisors (see below), whose sum is σ = 37877784000. Its totient is φ = 9216218880.

The previous prime is 18988799657. The next prime is 18988799719. The reversal of 18988799696 is 69699788981.

It is a happy number.

It is a super-3 number, since 3×18988799696³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18988799696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57815 + ... + 203273.

It is an arithmetic number, because the mean of its divisors is an integer number (946944600).

Almost surely, 2^18988799696 is an apocalyptic number.

18988799696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18988799696 is a deficient number, since it is larger than the sum of its proper divisors (18888984304).

18988799696 is a wasteful number, since it uses less digits than its factorization.

18988799696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145707 (or 145701 counting only the distinct ones).

The product of its digits is 846526464, while the sum is 80.

The spelling of 18988799696 in words is "eighteen billion, nine hundred eighty-eight million, seven hundred ninety-nine thousand, six hundred ninety-six".