18000546957 has 6 divisors (see below), whose sum is σ = 26000790062. Its totient is φ = 12000364632.

The previous prime is 18000546943. The next prime is 18000546973. The reversal of 18000546957 is 75964500081.

18000546957 is a `hidden beast` number, since 18 + 0 + 0 + 0 + 546 + 95 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17386795881 + 613751076 = 131859^2 + 24774^2 .

It is not a de Polignac number, because 18000546957 - 2⁷ = 18000546829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18000546457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1000030378 + ... + 1000030395.

Almost surely, 2^18000546957 is an apocalyptic number.

It is an amenable number.

18000546957 is a deficient number, since it is larger than the sum of its proper divisors (8000243105).

18000546957 is a wasteful number, since it uses less digits than its factorization.

18000546957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000060779 (or 2000060776 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 18000546957 in words is "eighteen billion, five hundred forty-six thousand, nine hundred fifty-seven".