20920272 has 20 divisors (see below), whose sum is σ = 54044160. Its totient is φ = 6973408.

The previous prime is 20920259. The next prime is 20920301. The reversal of 20920272 is 27202902.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 217872 + ... + 217967.

It is an arithmetic number, because the mean of its divisors is an integer number (2702208).

Almost surely, 2^20920272 is an apocalyptic number.

It is an amenable number.

20920272 is an abundant number, since it is smaller than the sum of its proper divisors (33123888).

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

20920272 is a wasteful number, since it uses less digits than its factorization.

20920272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435850 (or 435844 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20920272 is about 4573.8683846390. The cubic root of 20920272 is about 275.5428264248.

The spelling of 20920272 in words is "twenty million, nine hundred twenty thousand, two hundred seventy-two".