18969888 has 48 divisors (see below), whose sum is σ = 56911680. Its totient is φ = 5419776.

The previous prime is 18969877. The next prime is 18969901. The reversal of 18969888 is 88896981.

It is a tau number, because it is divible by the number of its divisors (48).

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, 13443 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (1185660).

Almost surely, 2^18969888 is an apocalyptic number.

It is an amenable number.

18969888 is an abundant number, since it is smaller than the sum of its proper divisors (37941792).

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

18969888 is a wasteful number, since it uses less digits than its factorization.

18969888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28249 (or 28241 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 57.

The square root of 18969888 is about 4355.4434906218. The cubic root of 18969888 is about 266.6991238271.

The spelling of 18969888 in words is "eighteen million, nine hundred sixty-nine thousand, eight hundred eighty-eight".