18899814 has 8 divisors (see below), whose sum is σ = 37799640. Its totient is φ = 6299936.

The previous prime is 18899807. The next prime is 18899821. The reversal of 18899814 is 41899881.

It is an interprime number because it is at equal distance from previous prime (18899807) and next prime (18899821).

It is a sphenic number, since it is the product of 3 distinct primes.

18899814 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1574979 + ... + 1574990.

It is an arithmetic number, because the mean of its divisors is an integer number (4724955).

Almost surely, 2^18899814 is an apocalyptic number.

18899814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18899814 is a wasteful number, since it uses less digits than its factorization.

18899814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149974.

The product of its digits is 165888, while the sum is 48.

The square root of 18899814 is about 4347.3916317719. The cubic root of 18899814 is about 266.3703267096.

The spelling of 18899814 in words is "eighteen million, eight hundred ninety-nine thousand, eight hundred fourteen".