18899464 has 8 divisors (see below), whose sum is σ = 35436510. Its totient is φ = 9449728.

The previous prime is 18899459. The next prime is 18899467. The reversal of 18899464 is 46499881.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 9351364 = 3090^2 + 3058^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18899467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1181209 + ... + 1181224.

Almost surely, 2^18899464 is an apocalyptic number.

It is an amenable number.

18899464 is a deficient number, since it is larger than the sum of its proper divisors (16537046).

18899464 is a wasteful number, since it uses less digits than its factorization.

18899464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362439 (or 2362435 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 18899464 is about 4347.3513775631. The cubic root of 18899464 is about 266.3686824220.

The spelling of 18899464 in words is "eighteen million, eight hundred ninety-nine thousand, four hundred sixty-four".