18681310496 has 12 divisors (see below), whose sum is σ = 36778830102. Its totient is φ = 9340655232.

The previous prime is 18681310469. The next prime is 18681310513. The reversal of 18681310496 is 69401318681.

It can be written as a sum of positive squares in only one way, i.e., 18649726096 + 31584400 = 136564^2 + 5620^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18681310496.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291895445 + ... + 291895508.

Almost surely, 2^18681310496 is an apocalyptic number.

18681310496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18681310496 is a deficient number, since it is larger than the sum of its proper divisors (18097519606).

18681310496 is an equidigital number, since it uses as much as digits as its factorization.

18681310496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583790963 (or 583790955 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 18681310496 in words is "eighteen billion, six hundred eighty-one million, three hundred ten thousand, four hundred ninety-six".