18949677 has 16 divisors (see below), whose sum is σ = 26764800. Its totient is φ = 11900592.

The previous prime is 18949663. The next prime is 18949681. The reversal of 18949677 is 77694981.

It is not a de Polignac number, because 18949677 - 2⁷ = 18949549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2574 + ... + 6672.

It is an arithmetic number, because the mean of its divisors is an integer number (1672800).

Almost surely, 2^18949677 is an apocalyptic number.

It is an amenable number.

18949677 is a deficient number, since it is larger than the sum of its proper divisors (7815123).

18949677 is a wasteful number, since it uses less digits than its factorization.

18949677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192.

The product of its digits is 762048, while the sum is 51.

The square root of 18949677 is about 4353.1226722894. The cubic root of 18949677 is about 266.6043741651.

The spelling of 18949677 in words is "eighteen million, nine hundred forty-nine thousand, six hundred seventy-seven".