19418860965 has 64 divisors (see below), whose sum is σ = 36311961600. Its totient is φ = 8857961280.

The previous prime is 19418860957. The next prime is 19418861009. The reversal of 19418860965 is 56906881491.

It is not a de Polignac number, because 19418860965 - 2³ = 19418860957 is a prime.

It is a super-2 number, since 2×19418860965² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2522352 + ... + 2530038.

It is an arithmetic number, because the mean of its divisors is an integer number (567374400).

Almost surely, 2^19418860965 is an apocalyptic number.

19418860965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19418860965 is a deficient number, since it is larger than the sum of its proper divisors (16893100635).

19418860965 is an equidigital number, since it uses as much as digits as its factorization.

19418860965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207 (or 8193 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 19418860965 in words is "nineteen billion, four hundred eighteen million, eight hundred sixty thousand, nine hundred sixty-five".