18740956317 has 16 divisors (see below), whose sum is σ = 26203707840. Its totient is φ = 11897891712.

The previous prime is 18740956231. The next prime is 18740956319. The reversal of 18740956317 is 71365904781.

It is a happy number.

It is not a de Polignac number, because 18740956317 - 2⁷ = 18740956189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18740956317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740956319) 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, 1469083 + ... + 1481784.

It is an arithmetic number, because the mean of its divisors is an integer number (1637731740).

Almost surely, 2^18740956317 is an apocalyptic number.

It is an amenable number.

18740956317 is a deficient number, since it is larger than the sum of its proper divisors (7462751523).

18740956317 is a wasteful number, since it uses less digits than its factorization.

18740956317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950972.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 18740956317 in words is "eighteen billion, seven hundred forty million, nine hundred fifty-six thousand, three hundred seventeen".