18071472 has 40 divisors (see below), whose sum is σ = 46854144. Its totient is φ = 6001984.

The previous prime is 18071461. The next prime is 18071479. The reversal of 18071472 is 27417081.

It is not an unprimeable number, because it can be changed into a prime (18071479) 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, 17893 + ... + 18875.

Almost surely, 2^18071472 is an apocalyptic number.

18071472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18071472 is an abundant number, since it is smaller than the sum of its proper divisors (28782672).

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

18071472 is a wasteful number, since it uses less digits than its factorization.

18071472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18071472 is about 4251.0553983687. The cubic root of 18071472 is about 262.4205510129.

The spelling of 18071472 in words is "eighteen million, seventy-one thousand, four hundred seventy-two".