20888166 has 16 divisors (see below), whose sum is σ = 44990064. Its totient is φ = 6427104.

The previous prime is 20888159. The next prime is 20888171. The reversal of 20888166 is 66188802.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 133821 + ... + 133976.

It is an arithmetic number, because the mean of its divisors is an integer number (2811879).

Almost surely, 2^20888166 is an apocalyptic number.

20888166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20888166 is an abundant number, since it is smaller than the sum of its proper divisors (24101898).

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

20888166 is a wasteful number, since it uses less digits than its factorization.

20888166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267815.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 20888166 is about 4570.3573164469. The cubic root of 20888166 is about 275.4017972289.

The spelling of 20888166 in words is "twenty million, eight hundred eighty-eight thousand, one hundred sixty-six".