18009744597 has 24 divisors (see below), whose sum is σ = 29663112024. Its totient is φ = 10430982144.

The previous prime is 18009744569. The next prime is 18009744607. The reversal of 18009744597 is 79544790081.

18009744597 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 9 + 7 + 44 + 597 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3715390116 + 14294354481 = 60954^2 + 119559^2 .

It is not a de Polignac number, because 18009744597 - 2¹⁴ = 18009728213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18009744527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4525348 + ... + 4529325.

It is an arithmetic number, because the mean of its divisors is an integer number (1235963001).

Almost surely, 2^18009744597 is an apocalyptic number.

18009744597 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18009744597 is a deficient number, since it is larger than the sum of its proper divisors (11653367427).

18009744597 is a wasteful number, since it uses less digits than its factorization.

18009744597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9054709 (or 9054706 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 18009744597 in words is "eighteen billion, nine million, seven hundred forty-four thousand, five hundred ninety-seven".