18897593108 has 24 divisors (see below), whose sum is σ = 35038785600. Its totient is φ = 8887230848.

The previous prime is 18897593069. The next prime is 18897593131. The reversal of 18897593108 is 80139579881.

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, 16883 + ... + 195141.

It is an arithmetic number, because the mean of its divisors is an integer number (1459949400).

Almost surely, 2^18897593108 is an apocalyptic number.

It is an amenable number.

18897593108 is a deficient number, since it is larger than the sum of its proper divisors (16141192492).

18897593108 is a wasteful number, since it uses less digits than its factorization.

18897593108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179839 (or 179837 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 59.

The spelling of 18897593108 in words is "eighteen billion, eight hundred ninety-seven million, five hundred ninety-three thousand, one hundred eight".