20655166 has 24 divisors (see below), whose sum is σ = 37941480. Its totient is φ = 8385552.

The previous prime is 20655161. The next prime is 20655169. The reversal of 20655166 is 66155602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655161) 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, 3685 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (1580895).

Almost surely, 2^20655166 is an apocalyptic number.

20655166 is a deficient number, since it is larger than the sum of its proper divisors (17286314).

20655166 is a wasteful number, since it uses less digits than its factorization.

20655166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128 (or 11121 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 20655166 is about 4544.7954849476. The cubic root of 20655166 is about 274.3739632383.

The spelling of 20655166 in words is "twenty million, six hundred fifty-five thousand, one hundred sixty-six".