18820474 has 8 divisors (see below), whose sum is σ = 28548180. Its totient is φ = 9304416.

The previous prime is 18820453. The next prime is 18820481. The reversal of 18820474 is 47402881.

It can be written as a sum of positive squares in 2 ways, for example, as 18429849 + 390625 = 4293^2 + 625^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52689 + ... + 53044.

Almost surely, 2^18820474 is an apocalyptic number.

18820474 is a deficient number, since it is larger than the sum of its proper divisors (9727706).

18820474 is a wasteful number, since it uses less digits than its factorization.

18820474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105824.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 18820474 is about 4338.2570232756. The cubic root of 18820474 is about 265.9970697097.

The spelling of 18820474 in words is "eighteen million, eight hundred twenty thousand, four hundred seventy-four".