18620338 has 16 divisors (see below), whose sum is σ = 32262624. Its totient is φ = 7965760.

The previous prime is 18620297. The next prime is 18620339. The reversal of 18620338 is 83302681.

It is not an unprimeable number, because it can be changed into a prime (18620339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24520 + ... + 25267.

It is an arithmetic number, because the mean of its divisors is an integer number (2016414).

Almost surely, 2^18620338 is an apocalyptic number.

18620338 is a deficient number, since it is larger than the sum of its proper divisors (13642286).

18620338 is a wasteful number, since it uses less digits than its factorization.

18620338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49817.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18620338 is about 4315.1289667865. The cubic root of 18620338 is about 265.0508410820.

The spelling of 18620338 in words is "eighteen million, six hundred twenty thousand, three hundred thirty-eight".