18672280 has 32 divisors (see below), whose sum is σ = 45833040. Its totient is φ = 6789760.

The previous prime is 18672257. The next prime is 18672281. The reversal of 18672280 is 8227681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18672281) 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, 20779 + ... + 21658.

Almost surely, 2^18672280 is an apocalyptic number.

18672280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18672280 is an abundant number, since it is smaller than the sum of its proper divisors (27160760).

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

18672280 is a wasteful number, since it uses less digits than its factorization.

18672280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42459 (or 42455 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 18672280 is about 4321.1433672120. The cubic root of 18672280 is about 265.2970680692.

The spelling of 18672280 in words is "eighteen million, six hundred seventy-two thousand, two hundred eighty".