18719464 has 8 divisors (see below), whose sum is σ = 35099010. Its totient is φ = 9359728.

The previous prime is 18719429. The next prime is 18719473. The reversal of 18719464 is 46491781.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 4656964 = 3750^2 + 2158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1169959 + ... + 1169974.

Almost surely, 2^18719464 is an apocalyptic number.

It is an amenable number.

18719464 is a deficient number, since it is larger than the sum of its proper divisors (16379546).

18719464 is a wasteful number, since it uses less digits than its factorization.

18719464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339939 (or 2339935 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 18719464 is about 4326.5995885915. The cubic root of 18719464 is about 265.5203446354.

The spelling of 18719464 in words is "eighteen million, seven hundred nineteen thousand, four hundred sixty-four".