18799974770 has 32 divisors (see below), whose sum is σ = 34693187760. Its totient is φ = 7330677760.

The previous prime is 18799974749. The next prime is 18799974839. The reversal of 18799974770 is 7747999781.

It is a Cunningham number, because it is equal to 137113²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 3061519561 + 15738455209 = 55331^2 + 125453^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18799974770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510704 + ... + 546276.

Almost surely, 2^18799974770 is an apocalyptic number.

18799974770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18799974770 is a deficient number, since it is larger than the sum of its proper divisors (15893212990).

18799974770 is a wasteful number, since it uses less digits than its factorization.

18799974770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36910.

The product of its (nonzero) digits is 56010528, while the sum is 68.

The spelling of 18799974770 in words is "eighteen billion, seven hundred ninety-nine million, nine hundred seventy-four thousand, seven hundred seventy".