18839901 has 8 divisors (see below), whose sum is σ = 25149184. Its totient is φ = 12545280.

The previous prime is 18839867. The next prime is 18839917. The reversal of 18839901 is 10993881.

It is a happy number.

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

It is not a de Polignac number, because 18839901 - 2⁶ = 18839837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18839901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18839941) 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, 196 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (3143648).

Almost surely, 2^18839901 is an apocalyptic number.

It is an amenable number.

18839901 is a deficient number, since it is larger than the sum of its proper divisors (6309283).

18839901 is an equidigital number, since it uses as much as digits as its factorization.

18839901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 18839901 is about 4340.4954786291. The cubic root of 18839901 is about 266.0885613493.

The spelling of 18839901 in words is "eighteen million, eight hundred thirty-nine thousand, nine hundred one".