20949166 has 24 divisors (see below), whose sum is σ = 36747216. Its totient is φ = 8930880.

The previous prime is 20949163. The next prime is 20949167. The reversal of 20949166 is 66194902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20949161) 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, 23175 + ... + 24061.

It is an arithmetic number, because the mean of its divisors is an integer number (1531134).

Almost surely, 2^20949166 is an apocalyptic number.

20949166 is a deficient number, since it is larger than the sum of its proper divisors (15798050).

20949166 is a wasteful number, since it uses less digits than its factorization.

20949166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20949166 is about 4577.0258902479. The cubic root of 20949166 is about 275.6696232447.

It can be divided in two parts, 20949 and 166, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20949166 in words is "twenty million, nine hundred forty-nine thousand, one hundred sixty-six".