18495616 has 16 divisors (see below), whose sum is σ = 36846990. Its totient is φ = 9247744.

The previous prime is 18495613. The next prime is 18495629. The reversal of 18495616 is 61659481.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 40000 = 4296^2 + 200^2 .

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

It is a super-2 number, since 2×18495616² = 684175622438912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18495613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72121 + ... + 72376.

Almost surely, 2^18495616 is an apocalyptic number.

18495616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18495616 is a deficient number, since it is larger than the sum of its proper divisors (18351374).

18495616 is an equidigital number, since it uses as much as digits as its factorization.

18495616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144511 (or 144499 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 18495616 is about 4300.6529736774. The cubic root of 18495616 is about 264.4577305557.

The spelling of 18495616 in words is "eighteen million, four hundred ninety-five thousand, six hundred sixteen".