18886964 has 6 divisors (see below), whose sum is σ = 33052194. Its totient is φ = 9443480.

The previous prime is 18886963. The next prime is 18887009. The reversal of 18886964 is 46968881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 824464 = 4250^2 + 908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18886963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360867 + ... + 2360874.

It is an arithmetic number, because the mean of its divisors is an integer number (5508699).

Almost surely, 2^18886964 is an apocalyptic number.

It is an amenable number.

18886964 is a deficient number, since it is larger than the sum of its proper divisors (14165230).

18886964 is a wasteful number, since it uses less digits than its factorization.

18886964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4721745 (or 4721743 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 18886964 is about 4345.9134828020. The cubic root of 18886964 is about 266.3099445506.

The spelling of 18886964 in words is "eighteen million, eight hundred eighty-six thousand, nine hundred sixty-four".