18236474 has 8 divisors (see below), whose sum is σ = 27506388. Its totient is φ = 9067680.

The previous prime is 18236473. The next prime is 18236479. The reversal of 18236474 is 47463281.

It can be written as a sum of positive squares in 2 ways, for example, as 17347225 + 889249 = 4165^2 + 943^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18236473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24827 + ... + 25550.

Almost surely, 2^18236474 is an apocalyptic number.

18236474 is a deficient number, since it is larger than the sum of its proper divisors (9269914).

18236474 is a wasteful number, since it uses less digits than its factorization.

18236474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50560.

The product of its digits is 32256, while the sum is 35.

The square root of 18236474 is about 4270.4184806644. The cubic root of 18236474 is about 263.2168114864.

The spelling of 18236474 in words is "eighteen million, two hundred thirty-six thousand, four hundred seventy-four".