18120954599 has 8 divisors (see below), whose sum is σ = 19769288448. Its totient is φ = 16472783160.

The previous prime is 18120954581. The next prime is 18120954617. The reversal of 18120954599 is 99545902181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18120954581) and next prime (18120954617).

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

It is a cyclic number.

It is not a de Polignac number, because 18120954599 - 2³² = 13825987303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18120954599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18120954539) 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, 416264 + ... + 457730.

It is an arithmetic number, because the mean of its divisors is an integer number (2471161056).

Almost surely, 2^18120954599 is an apocalyptic number.

18120954599 is a deficient number, since it is larger than the sum of its proper divisors (1648333849).

18120954599 is a wasteful number, since it uses less digits than its factorization.

18120954599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81205.

The product of its (nonzero) digits is 1166400, while the sum is 53.

The spelling of 18120954599 in words is "eighteen billion, one hundred twenty million, nine hundred fifty-four thousand, five hundred ninety-nine".