18620790 has 16 divisors (see below), whose sum is σ = 44689968. Its totient is φ = 4965536.

The previous prime is 18620773. The next prime is 18620803. The reversal of 18620790 is 9702681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310317 + ... + 310376.

It is an arithmetic number, because the mean of its divisors is an integer number (2793123).

Almost surely, 2^18620790 is an apocalyptic number.

18620790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18620790 is an abundant number, since it is smaller than the sum of its proper divisors (26069178).

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

18620790 is a wasteful number, since it uses less digits than its factorization.

18620790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620703.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18620790 is about 4315.1813403379. The cubic root of 18620790 is about 265.0529857264.

The spelling of 18620790 in words is "eighteen million, six hundred twenty thousand, seven hundred ninety".