18914490 has 72 divisors (see below), whose sum is σ = 57220020. Its totient is φ = 4322304.

The previous prime is 18914477. The next prime is 18914501. The reversal of 18914490 is 9441981.

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 741321 = 4263^2 + 861^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2266 + ... + 6554.

Almost surely, 2^18914490 is an apocalyptic number.

18914490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18914490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28610010).

18914490 is an abundant number, since it is smaller than the sum of its proper divisors (38305530).

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

18914490 is a wasteful number, since it uses less digits than its factorization.

18914490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316 (or 4306 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18914490 is about 4349.0792128909. The cubic root of 18914490 is about 266.4392557740.

The spelling of 18914490 in words is "eighteen million, nine hundred fourteen thousand, four hundred ninety".