18820074 has 32 divisors (see below), whose sum is σ = 46327680. Its totient is φ = 4963392.

The previous prime is 18820073. The next prime is 18820079. The reversal of 18820074 is 47002881.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18820073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16689 + ... + 17780.

It is an arithmetic number, because the mean of its divisors is an integer number (1447740).

Almost surely, 2^18820074 is an apocalyptic number.

18820074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18820074 is an abundant number, since it is smaller than the sum of its proper divisors (27507606).

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

18820074 is a wasteful number, since it uses less digits than its factorization.

18820074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34494.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 18820074 is about 4338.2109215666. The cubic root of 18820074 is about 265.9951852446.

The spelling of 18820074 in words is "eighteen million, eight hundred twenty thousand, seventy-four".