20774172 has 12 divisors (see below), whose sum is σ = 48473096. Its totient is φ = 6924720.

The previous prime is 20774161. The next prime is 20774177. The reversal of 20774172 is 27147702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20774177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865579 + ... + 865602.

Almost surely, 2^20774172 is an apocalyptic number.

It is an amenable number.

20774172 is an abundant number, since it is smaller than the sum of its proper divisors (27698924).

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

20774172 is a wasteful number, since it uses less digits than its factorization.

20774172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731188 (or 1731186 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 20774172 is about 4557.8692390195. The cubic root of 20774172 is about 274.8998952450.

The spelling of 20774172 in words is "twenty million, seven hundred seventy-four thousand, one hundred seventy-two".