18901039 has 4 divisors (see below), whose sum is σ = 19088280. Its totient is φ = 18713800.

The previous prime is 18901031. The next prime is 18901061. The reversal of 18901039 is 93010981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18901039 - 2³ = 18901031 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 18901039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18901031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93469 + ... + 93670.

It is an arithmetic number, because the mean of its divisors is an integer number (4772070).

Almost surely, 2^18901039 is an apocalyptic number.

18901039 is a deficient number, since it is larger than the sum of its proper divisors (187241).

18901039 is a wasteful number, since it uses less digits than its factorization.

18901039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187240.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 18901039 is about 4347.5325185673. The cubic root of 18901039 is about 266.3760815564.

The spelling of 18901039 in words is "eighteen million, nine hundred one thousand, thirty-nine".