17994972 has 24 divisors (see below), whose sum is σ = 42270592. Its totient is φ = 5958000.

The previous prime is 17994961. The next prime is 17994979. The reversal of 17994972 is 27949971.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17994979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3154 + ... + 6777.

Almost surely, 2^17994972 is an apocalyptic number.

17994972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

17994972 is an abundant number, since it is smaller than the sum of its proper divisors (24275620).

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

17994972 is a wasteful number, since it uses less digits than its factorization.

17994972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10089 (or 10087 counting only the distinct ones).

The product of its digits is 285768, while the sum is 48.

The square root of 17994972 is about 4242.0480902507. The cubic root of 17994972 is about 262.0497351341.

The spelling of 17994972 in words is "seventeen million, nine hundred ninety-four thousand, nine hundred seventy-two".