20920166 has 8 divisors (see below), whose sum is σ = 33226200. Its totient is φ = 9844768.

The previous prime is 20920157. The next prime is 20920181. The reversal of 20920166 is 66102902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307616 + ... + 307683.

It is an arithmetic number, because the mean of its divisors is an integer number (4153275).

Almost surely, 2^20920166 is an apocalyptic number.

20920166 is a deficient number, since it is larger than the sum of its proper divisors (12306034).

20920166 is a wasteful number, since it uses less digits than its factorization.

20920166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615318.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20920166 is about 4573.8567970587. The cubic root of 20920166 is about 275.5423610454.

The spelling of 20920166 in words is "twenty million, nine hundred twenty thousand, one hundred sixty-six".