20903166 has 24 divisors (see below), whose sum is σ = 47955024. Its totient is φ = 6557760.

The previous prime is 20903161. The next prime is 20903189. The reversal of 20903166 is 66130902.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20903161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33850 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (1998126).

Almost surely, 2^20903166 is an apocalyptic number.

20903166 is an abundant number, since it is smaller than the sum of its proper divisors (27051858).

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

20903166 is a wasteful number, since it uses less digits than its factorization.

20903166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68336 (or 68333 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20903166 is about 4571.9980314956. The cubic root of 20903166 is about 275.4677043795.

The spelling of 20903166 in words is "twenty million, nine hundred three thousand, one hundred sixty-six".