18247509957 has 8 divisors (see below), whose sum is σ = 24545323584. Its totient is φ = 12057351488.

The previous prime is 18247509953. The next prime is 18247509961. The reversal of 18247509957 is 75990574281.

It is an interprime number because it is at equal distance from previous prime (18247509953) and next prime (18247509961).

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 18247509957 - 2² = 18247509953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18247509897 and 18247509906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18247509953) 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, 26913393 + ... + 26914070.

It is an arithmetic number, because the mean of its divisors is an integer number (3068165448).

Almost surely, 2^18247509957 is an apocalyptic number.

It is an amenable number.

18247509957 is a deficient number, since it is larger than the sum of its proper divisors (6297813627).

18247509957 is a wasteful number, since it uses less digits than its factorization.

18247509957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53827579.

The product of its (nonzero) digits is 6350400, while the sum is 57.

The spelling of 18247509957 in words is "eighteen billion, two hundred forty-seven million, five hundred nine thousand, nine hundred fifty-seven".