18948839 has 24 divisors (see below), whose sum is σ = 24016608. Its totient is φ = 14817600.

The previous prime is 18948827. The next prime is 18948851. The reversal of 18948839 is 93884981.

It is an interprime number because it is at equal distance from previous prime (18948827) and next prime (18948851).

It is not a de Polignac number, because 18948839 - 2⁴ = 18948823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948869) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96089 + ... + 96285.

It is an arithmetic number, because the mean of its divisors is an integer number (1000692).

Almost surely, 2^18948839 is an apocalyptic number.

18948839 is a deficient number, since it is larger than the sum of its proper divisors (5067769).

18948839 is a wasteful number, since it uses less digits than its factorization.

18948839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 368 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The square root of 18948839 is about 4353.0264184817. The cubic root of 18948839 is about 266.6004441463.

The spelling of 18948839 in words is "eighteen million, nine hundred forty-eight thousand, eight hundred thirty-nine".