18734814 has 48 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 5351832.

The previous prime is 18734809. The next prime is 18734851. The reversal of 18734814 is 41843781.

It is a super-2 number, since 2×18734814² = 701986511229192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 649 + ... + 6155.

It is an arithmetic number, because the mean of its divisors is an integer number (1002456).

Almost surely, 2^18734814 is an apocalyptic number.

18734814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18734814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24058944).

18734814 is an abundant number, since it is smaller than the sum of its proper divisors (29383074).

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

18734814 is an equidigital number, since it uses as much as digits as its factorization.

18734814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531 (or 5519 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 18734814 is about 4328.3731354864. The cubic root of 18734814 is about 265.5929005548.

The spelling of 18734814 in words is "eighteen million, seven hundred thirty-four thousand, eight hundred fourteen".