18820086 has 16 divisors (see below), whose sum is σ = 38257968. Its totient is φ = 6170400.

The previous prime is 18820079. The next prime is 18820097. The reversal of 18820086 is 68002881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25345 + ... + 26076.

It is an arithmetic number, because the mean of its divisors is an integer number (2391123).

Almost surely, 2^18820086 is an apocalyptic number.

18820086 is an abundant number, since it is smaller than the sum of its proper divisors (19437882).

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

18820086 is a wasteful number, since it uses less digits than its factorization.

18820086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51487.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18820086 is about 4338.2123046250. The cubic root of 18820086 is about 265.9952417789.

The spelling of 18820086 in words is "eighteen million, eight hundred twenty thousand, eighty-six".