18986902 has 12 divisors (see below), whose sum is σ = 31102956. Its totient is φ = 8621120.

The previous prime is 18986887. The next prime is 18986953. The reversal of 18986902 is 20968981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19974 + ... + 20902.

It is an arithmetic number, because the mean of its divisors is an integer number (2591913).

Almost surely, 2^18986902 is an apocalyptic number.

18986902 is a deficient number, since it is larger than the sum of its proper divisors (12116054).

18986902 is an frugal number, since it uses more digits than its factorization.

18986902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 18986902 is about 4357.3962408760. The cubic root of 18986902 is about 266.7788337157.

The spelling of 18986902 in words is "eighteen million, nine hundred eighty-six thousand, nine hundred two".