18839699 has 4 divisors (see below), whose sum is σ = 19006536. Its totient is φ = 18672864.

The previous prime is 18839677. The next prime is 18839707. The reversal of 18839699 is 99693881.

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 18839699 - 2¹² = 18835603 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 18839699.

It is not an unprimeable number, because it can be changed into a prime (18839399) 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, 83249 + ... + 83474.

It is an arithmetic number, because the mean of its divisors is an integer number (4751634).

Almost surely, 2^18839699 is an apocalyptic number.

18839699 is a deficient number, since it is larger than the sum of its proper divisors (166837).

18839699 is a wasteful number, since it uses less digits than its factorization.

18839699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166836.

The product of its digits is 839808, while the sum is 53.

The square root of 18839699 is about 4340.4722093339. The cubic root of 18839699 is about 266.0876103521.

The spelling of 18839699 in words is "eighteen million, eight hundred thirty-nine thousand, six hundred ninety-nine".