18879996 has 48 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 5610240.

The previous prime is 18879919. The next prime is 18880007. The reversal of 18879996 is 69997881.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1441 + ... + 6311.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^18879996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18879996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24554880).

18879996 is an abundant number, since it is smaller than the sum of its proper divisors (30229764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18879996 is a wasteful number, since it uses less digits than its factorization.

18879996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914 (or 4912 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 57.

The square root of 18879996 is about 4345.1117361928. Note that the first 3 decimals coincide. The cubic root of 18879996 is about 266.2771904608.

The spelling of 18879996 in words is "eighteen million, eight hundred seventy-nine thousand, nine hundred ninety-six".