18457774272 has 84 divisors (see below), whose sum is σ = 60463872976. Its totient is φ = 5273648640.

The previous prime is 18457774271. The next prime is 18457774273. The reversal of 18457774272 is 27247775481.

It is a happy number.

18457774272 is a `hidden beast` number, since 18 + 457 + 77 + 42 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (18457774271) and next prime (18457774273).

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×18457774272² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18457774271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2284879 + ... + 2292942.

Almost surely, 2^18457774272 is an apocalyptic number.

18457774272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18457774272 is an abundant number, since it is smaller than the sum of its proper divisors (42006098704).

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

18457774272 is a wasteful number, since it uses less digits than its factorization.

18457774272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577846 (or 4577833 counting only the distinct ones).

The product of its digits is 6146560, while the sum is 54.

The spelling of 18457774272 in words is "eighteen billion, four hundred fifty-seven million, seven hundred seventy-four thousand, two hundred seventy-two".