20888130 has 16 divisors (see below), whose sum is σ = 50131584. Its totient is φ = 5570160.

The previous prime is 20888123. The next prime is 20888143. The reversal of 20888130 is 3188802.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 696271 = 20888130 / (2 + 0 + 8 + 8 + 8 + 1 + 3 + 0).

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 348106 + ... + 348165.

It is an arithmetic number, because the mean of its divisors is an integer number (3133224).

Almost surely, 2^20888130 is an apocalyptic number.

20888130 is an abundant number, since it is smaller than the sum of its proper divisors (29243454).

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

20888130 is a wasteful number, since it uses less digits than its factorization.

20888130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696281.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 20888130 is about 4570.3533780223. The cubic root of 20888130 is about 275.4016390138.

The spelling of 20888130 in words is "twenty million, eight hundred eighty-eight thousand, one hundred thirty".