18257206747 has 16 divisors (see below), whose sum is σ = 20314784448. Its totient is φ = 16301900160.

The previous prime is 18257206631. The next prime is 18257206789. The reversal of 18257206747 is 74760275281.

It is a de Polignac number, because none of the positive numbers 2^k-18257206747 is a prime.

It is a super-4 number, since 4×18257206747⁴ (a number of 42 digits) contains 4444 as substring.

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 18257206747.

It is not an unprimeable number, because it can be changed into a prime (18257206147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137688 + ... + 235525.

It is an arithmetic number, because the mean of its divisors is an integer number (1269674028).

Almost surely, 2^18257206747 is an apocalyptic number.

18257206747 is a deficient number, since it is larger than the sum of its proper divisors (2057577701).

18257206747 is a wasteful number, since it uses less digits than its factorization.

18257206747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373350.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 18257206747 in words is "eighteen billion, two hundred fifty-seven million, two hundred six thousand, seven hundred forty-seven".