18036418551 has 8 divisors (see below), whose sum is σ = 24148345584. Its totient is φ = 11974385280.

The previous prime is 18036418541. The next prime is 18036418567. The reversal of 18036418551 is 15581463081.

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

It is not a de Polignac number, because 18036418551 - 2⁶ = 18036418487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036418511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12472596 + ... + 12474041.

It is an arithmetic number, because the mean of its divisors is an integer number (3018543198).

Almost surely, 2^18036418551 is an apocalyptic number.

18036418551 is a deficient number, since it is larger than the sum of its proper divisors (6111927033).

18036418551 is a wasteful number, since it uses less digits than its factorization.

18036418551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24946881.

The product of its (nonzero) digits is 115200, while the sum is 42.

The spelling of 18036418551 in words is "eighteen billion, thirty-six million, four hundred eighteen thousand, five hundred fifty-one".