20666130 has 16 divisors (see below), whose sum is σ = 49598784. Its totient is φ = 5510960.

The previous prime is 20666111. The next prime is 20666143. The reversal of 20666130 is 3166602.

It is a self number, because there is not a number n which added to its sum of digits gives 20666130.

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, 344406 + ... + 344465.

It is an arithmetic number, because the mean of its divisors is an integer number (3099924).

Almost surely, 2^20666130 is an apocalyptic number.

20666130 is an abundant number, since it is smaller than the sum of its proper divisors (28932654).

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

20666130 is a wasteful number, since it uses less digits than its factorization.

20666130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688881.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20666130 is about 4546.0015398150. The cubic root of 20666130 is about 274.4225016043.

The spelling of 20666130 in words is "twenty million, six hundred sixty-six thousand, one hundred thirty".