18722409465 has 8 divisors (see below), whose sum is σ = 29955855168. Its totient is φ = 9985285040.

The previous prime is 18722409457. The next prime is 18722409481. The reversal of 18722409465 is 56490422781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18722409465 - 2³ = 18722409457 is a prime.

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, 624080301 + ... + 624080330.

It is an arithmetic number, because the mean of its divisors is an integer number (3744481896).

Almost surely, 2^18722409465 is an apocalyptic number.

18722409465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18722409465 is a deficient number, since it is larger than the sum of its proper divisors (11233445703).

18722409465 is a wasteful number, since it uses less digits than its factorization.

18722409465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248160639.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 18722409465 in words is "eighteen billion, seven hundred twenty-two million, four hundred nine thousand, four hundred sixty-five".