18839975 has 24 divisors (see below), whose sum is σ = 29129088. Its totient is φ = 11743200.

The previous prime is 18839969. The next prime is 18839981. The reversal of 18839975 is 57993881.

It is an interprime number because it is at equal distance from previous prime (18839969) and next prime (18839981).

It is not a de Polignac number, because 18839975 - 2¹⁶ = 18774439 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2969 + ... + 6818.

It is an arithmetic number, because the mean of its divisors is an integer number (1213712).

Almost surely, 2^18839975 is an apocalyptic number.

18839975 is a deficient number, since it is larger than the sum of its proper divisors (10289113).

18839975 is a wasteful number, since it uses less digits than its factorization.

18839975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9815 (or 9810 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 18839975 is about 4340.5040029932. The cubic root of 18839975 is about 266.0889097328.

The spelling of 18839975 in words is "eighteen million, eight hundred thirty-nine thousand, nine hundred seventy-five".