18368597508 has 12 divisors (see below), whose sum is σ = 42860060880. Its totient is φ = 6122865832.

The previous prime is 18368597473. The next prime is 18368597509. The reversal of 18368597508 is 80579586381.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18368597509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765358218 + ... + 765358241.

It is an arithmetic number, because the mean of its divisors is an integer number (3571671740).

Almost surely, 2^18368597508 is an apocalyptic number.

It is an amenable number.

18368597508 is an abundant number, since it is smaller than the sum of its proper divisors (24491463372).

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

18368597508 is a wasteful number, since it uses less digits than its factorization.

18368597508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530716466 (or 1530716464 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 18368597508 in words is "eighteen billion, three hundred sixty-eight million, five hundred ninety-seven thousand, five hundred eight".