18457218768 has 40 divisors (see below), whose sum is σ = 47699188128. Its totient is φ = 6150078592.

The previous prime is 18457218763. The next prime is 18457218817. The reversal of 18457218768 is 86781275481.

It is a super-2 number, since 2×18457218768² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18457218761) 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, 57871 + ... + 200657.

Almost surely, 2^18457218768 is an apocalyptic number.

It is an amenable number.

18457218768 is an abundant number, since it is smaller than the sum of its proper divisors (29241969360).

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

18457218768 is a wasteful number, since it uses less digits than its factorization.

18457218768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145491 (or 145485 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 57.

The spelling of 18457218768 in words is "eighteen billion, four hundred fifty-seven million, two hundred eighteen thousand, seven hundred sixty-eight".