18974477 has 8 divisors (see below), whose sum is σ = 19652760. Its totient is φ = 18308160.

The previous prime is 18974441. The next prime is 18974489. The reversal of 18974477 is 77447981.

It can be written as a sum of positive squares in 4 ways, for example, as 17161 + 18957316 = 131^2 + 4354^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18974477 - 2⁶ = 18974413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299 + ... + 6167.

It is an arithmetic number, because the mean of its divisors is an integer number (2456595).

Almost surely, 2^18974477 is an apocalyptic number.

It is an amenable number.

18974477 is a deficient number, since it is larger than the sum of its proper divisors (678283).

18974477 is an equidigital number, since it uses as much as digits as its factorization.

18974477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983.

The product of its digits is 395136, while the sum is 47.

The square root of 18974477 is about 4355.9702707893. The cubic root of 18974477 is about 266.7206277953.

The spelling of 18974477 in words is "eighteen million, nine hundred seventy-four thousand, four hundred seventy-seven".