18949836 has 24 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 6182032.

The previous prime is 18949817. The next prime is 18949841. The reversal of 18949836 is 63894981.

It is an alternating number because its digits alternate between odd and even.

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, 16236 + ... + 17363.

It is an arithmetic number, because the mean of its divisors is an integer number (1881600).

Almost surely, 2^18949836 is an apocalyptic number.

It is an amenable number.

18949836 is an abundant number, since it is smaller than the sum of its proper divisors (26208564).

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

18949836 is a wasteful number, since it uses less digits than its factorization.

18949836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33653 (or 33651 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 18949836 is about 4353.1409350031. The cubic root of 18949836 is about 266.6051198238.

The spelling of 18949836 in words is "eighteen million, nine hundred forty-nine thousand, eight hundred thirty-six".