18207315768 has 32 divisors (see below), whose sum is σ = 45960220800. Its totient is φ = 6010181088.

The previous prime is 18207315743. The next prime is 18207315779. The reversal of 18207315768 is 86751370281.

It is a happy number.

It is a super-2 number, since 2×18207315768² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3680238 + ... + 3685181.

It is an arithmetic number, because the mean of its divisors is an integer number (1436256900).

Almost surely, 2^18207315768 is an apocalyptic number.

It is an amenable number.

18207315768 is an abundant number, since it is smaller than the sum of its proper divisors (27752905032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18207315768 is a wasteful number, since it uses less digits than its factorization.

18207315768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7365531 (or 7365527 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 18207315768 in words is "eighteen billion, two hundred seven million, three hundred fifteen thousand, seven hundred sixty-eight".