18811645240272 has 40 divisors (see below), whose sum is σ = 48843434239776. Its totient is φ = 6238718215296.

The previous prime is 18811645240217. The next prime is 18811645240303. The reversal of 18811645240272 is 27204254611881.

It is a super-2 number, since 2×18811645240272² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994684138 + ... + 994703049.

Almost surely, 2^{18811645240272} is an apocalyptic number.

18811645240272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18811645240272 is an abundant number, since it is smaller than the sum of its proper divisors (30031788999504).

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

18811645240272 is a wasteful number, since it uses less digits than its factorization.

18811645240272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989387395 (or 1989387389 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 51.

The spelling of 18811645240272 in words is "eighteen trillion, eight hundred eleven billion, six hundred forty-five million, two hundred forty thousand, two hundred seventy-two".