18974665 has 8 divisors (see below), whose sum is σ = 22795848. Its totient is φ = 15162240.

The previous prime is 18974663. The next prime is 18974693. The reversal of 18974665 is 56647981.

It can be written as a sum of positive squares in 4 ways, for example, as 104329 + 18870336 = 323^2 + 4344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18974665 - 2¹ = 18974663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18974663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4375 + ... + 7555.

It is an arithmetic number, because the mean of its divisors is an integer number (2849481).

Almost surely, 2^18974665 is an apocalyptic number.

It is an amenable number.

18974665 is a deficient number, since it is larger than the sum of its proper divisors (3821183).

18974665 is a wasteful number, since it uses less digits than its factorization.

18974665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379.

The product of its digits is 362880, while the sum is 46.

The square root of 18974665 is about 4355.9918503138. The cubic root of 18974665 is about 266.7215086858.

The spelling of 18974665 in words is "eighteen million, nine hundred seventy-four thousand, six hundred sixty-five".