18810396 has 36 divisors (see below), whose sum is σ = 51872184. Its totient is φ = 5700000.

The previous prime is 18810383. The next prime is 18810401. The reversal of 18810396 is 69301881.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18810396.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 23355 + ... + 24146.

It is an arithmetic number, because the mean of its divisors is an integer number (1440894).

Almost surely, 2^18810396 is an apocalyptic number.

It is an amenable number.

18810396 is an abundant number, since it is smaller than the sum of its proper divisors (33061788).

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

18810396 is a wasteful number, since it uses less digits than its factorization.

18810396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47522 (or 47517 counting only the distinct ones).

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

The square root of 18810396 is about 4337.0953413546. The cubic root of 18810396 is about 265.9495824697.

The spelling of 18810396 in words is "eighteen million, eight hundred ten thousand, three hundred ninety-six".