18868329 has 8 divisors (see below), whose sum is σ = 27953120. Its totient is φ = 12578868.

The previous prime is 18868309. The next prime is 18868361. The reversal of 18868329 is 92386881.

It is not a de Polignac number, because 18868329 - 2¹⁵ = 18835561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18868309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349387 + ... + 349440.

It is an arithmetic number, because the mean of its divisors is an integer number (3494140).

Almost surely, 2^18868329 is an apocalyptic number.

It is an amenable number.

18868329 is a deficient number, since it is larger than the sum of its proper divisors (9084791).

18868329 is an equidigital number, since it uses as much as digits as its factorization.

18868329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698836 (or 698830 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 18868329 is about 4343.7689855700. The cubic root of 18868329 is about 266.2223299950. Note that the first 3 decimals are identical.

The spelling of 18868329 in words is "eighteen million, eight hundred sixty-eight thousand, three hundred twenty-nine".