18208974 has 32 divisors (see below), whose sum is σ = 42197760. Its totient is φ = 5130432.

The previous prime is 18208963. The next prime is 18208979. The reversal of 18208974 is 47980281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18208979) 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 15 ways as a sum of consecutive naturals, for example, 97 + ... + 6035.

It is an arithmetic number, because the mean of its divisors is an integer number (1318680).

Almost surely, 2^18208974 is an apocalyptic number.

18208974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18208974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21098880).

18208974 is an abundant number, since it is smaller than the sum of its proper divisors (23988786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18208974 is a wasteful number, since it uses less digits than its factorization.

18208974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 18208974 is about 4267.1974409441. The cubic root of 18208974 is about 263.0844375085.

The spelling of 18208974 in words is "eighteen million, two hundred eight thousand, nine hundred seventy-four".