18031464 has 64 divisors (see below), whose sum is σ = 54648000. Its totient is φ = 5463360.

The previous prime is 18031463. The next prime is 18031483. The reversal of 18031464 is 46413081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18031463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1419 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (853875).

Almost surely, 2^18031464 is an apocalyptic number.

It is an amenable number.

18031464 is an abundant number, since it is smaller than the sum of its proper divisors (36616536).

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

18031464 is a wasteful number, since it uses less digits than its factorization.

18031464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18031464 is about 4246.3471360688. The cubic root of 18031464 is about 262.2267523981.

The spelling of 18031464 in words is "eighteen million, thirty-one thousand, four hundred sixty-four".