18966732 has 12 divisors (see below), whose sum is σ = 44255736. Its totient is φ = 6322240.

The previous prime is 18966719. The next prime is 18966733. The reversal of 18966732 is 23766981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18966733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790269 + ... + 790292.

It is an arithmetic number, because the mean of its divisors is an integer number (3687978).

Almost surely, 2^18966732 is an apocalyptic number.

18966732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18966732 is an abundant number, since it is smaller than the sum of its proper divisors (25289004).

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

18966732 is a wasteful number, since it uses less digits than its factorization.

18966732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580568 (or 1580566 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 18966732 is about 4355.0811703113. The cubic root of 18966732 is about 266.6843328574.

The spelling of 18966732 in words is "eighteen million, nine hundred sixty-six thousand, seven hundred thirty-two".