18710193397 has 16 divisors (see below), whose sum is σ = 21526065792. Its totient is φ = 15930331200.

The previous prime is 18710193391. The next prime is 18710193427. The reversal of 18710193397 is 79339101781.

It is not a de Polignac number, because 18710193397 - 2⁷ = 18710193269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18710193397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18710193391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876147 + ... + 897247.

It is an arithmetic number, because the mean of its divisors is an integer number (1345379112).

Almost surely, 2^18710193397 is an apocalyptic number.

It is an amenable number.

18710193397 is a deficient number, since it is larger than the sum of its proper divisors (2815872395).

18710193397 is a wasteful number, since it uses less digits than its factorization.

18710193397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21948.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 18710193397 in words is "eighteen billion, seven hundred ten million, one hundred ninety-three thousand, three hundred ninety-seven".