18916736 has 16 divisors (see below), whose sum is σ = 37685940. Its totient is φ = 9458304.

The previous prime is 18916721. The next prime is 18916739. The reversal of 18916736 is 63761981.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 18916693 and 18916702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18916739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73766 + ... + 74021.

Almost surely, 2^18916736 is an apocalyptic number.

18916736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18916736 is a deficient number, since it is larger than the sum of its proper divisors (18769204).

18916736 is an equidigital number, since it uses as much as digits as its factorization.

18916736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147801 (or 147789 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 18916736 is about 4349.3374208033. The cubic root of 18916736 is about 266.4498014611.

The spelling of 18916736 in words is "eighteen million, nine hundred sixteen thousand, seven hundred thirty-six".