16864618 has 4 divisors (see below), whose sum is σ = 25296930. Its totient is φ = 8432308.

The previous prime is 16864613. The next prime is 16864621. The reversal of 16864618 is 81646861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8838729 + 8025889 = 2973^2 + 2833^2 .

It is not an unprimeable number, because it can be changed into a prime (16864613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4216153 + ... + 4216156.

Almost surely, 2^16864618 is an apocalyptic number.

16864618 is a deficient number, since it is larger than the sum of its proper divisors (8432312).

16864618 is an equidigital number, since it uses as much as digits as its factorization.

16864618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432311.

The product of its digits is 55296, while the sum is 40.

The square root of 16864618 is about 4106.6553300709. The cubic root of 16864618 is about 256.4437798171.

The spelling of 16864618 in words is "sixteen million, eight hundred sixty-four thousand, six hundred eighteen".