18976985 has 16 divisors (see below), whose sum is σ = 23328000. Its totient is φ = 14816256.

The previous prime is 18976961. The next prime is 18976999. The reversal of 18976985 is 58967981.

It is a cyclic number.

It is not a de Polignac number, because 18976985 - 2⁶ = 18976921 is a prime.

Its product of digits (1088640) is a multiple of the sum of its prime divisors (640).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42041 + ... + 42489.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^18976985 is an apocalyptic number.

It is an amenable number.

18976985 is a deficient number, since it is larger than the sum of its proper divisors (4351015).

18976985 is a wasteful number, since it uses less digits than its factorization.

18976985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640.

The product of its digits is 1088640, while the sum is 53.

The square root of 18976985 is about 4356.2581420297. The cubic root of 18976985 is about 266.7323787711.

The spelling of 18976985 in words is "eighteen million, nine hundred seventy-six thousand, nine hundred eighty-five".