18641272 has 16 divisors (see below), whose sum is σ = 37641240. Its totient is φ = 8603616.

The previous prime is 18641251. The next prime is 18641297. The reversal of 18641272 is 27214681.

It is a super-3 number, since 3×18641272³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89518 + ... + 89725.

Almost surely, 2^18641272 is an apocalyptic number.

It is an amenable number.

18641272 is an abundant number, since it is smaller than the sum of its proper divisors (18999968).

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

18641272 is a wasteful number, since it uses less digits than its factorization.

18641272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179262 (or 179258 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 18641272 is about 4317.5539371269. The cubic root of 18641272 is about 265.1501320878.

It can be divided in two parts, 1864 and 1272, that added together give a square (3136 = 56²).

The spelling of 18641272 in words is "eighteen million, six hundred forty-one thousand, two hundred seventy-two".