18889712 has 30 divisors (see below), whose sum is σ = 37294488. Its totient is φ = 9268512.

The previous prime is 18889711. The next prime is 18889729. The reversal of 18889712 is 21798881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889711) 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 5 ways as a sum of consecutive naturals, for example, 71693 + ... + 71955.

Almost surely, 2^18889712 is an apocalyptic number.

It is an amenable number.

18889712 is a deficient number, since it is larger than the sum of its proper divisors (18404776).

18889712 is an equidigital number, since it uses as much as digits as its factorization.

18889712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 332 counting only the distinct ones).

The product of its digits is 64512, while the sum is 44.

The square root of 18889712 is about 4346.2296303808. The cubic root of 18889712 is about 266.3228597062.

The spelling of 18889712 in words is "eighteen million, eight hundred eighty-nine thousand, seven hundred twelve".