18878948 has 24 divisors (see below), whose sum is σ = 36167040. Its totient is φ = 8551520.

The previous prime is 18878939. The next prime is 18878987. The reversal of 18878948 is 84987881.

It is a self number, because there is not a number n which added to its sum of digits gives 18878948.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16565 + ... + 17667.

It is an arithmetic number, because the mean of its divisors is an integer number (1506960).

Almost surely, 2^18878948 is an apocalyptic number.

It is an amenable number.

18878948 is a deficient number, since it is larger than the sum of its proper divisors (17288092).

18878948 is a wasteful number, since it uses less digits than its factorization.

18878948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 1505 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 53.

The square root of 18878948 is about 4344.9911392315. The cubic root of 18878948 is about 266.2722634884.

The spelling of 18878948 in words is "eighteen million, eight hundred seventy-eight thousand, nine hundred forty-eight".