20813272 has 16 divisors (see below), whose sum is σ = 39412800. Its totient is φ = 10303200.

The previous prime is 20813257. The next prime is 20813279. The reversal of 20813272 is 27231802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20813279) 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, 12072 + ... + 13687.

It is an arithmetic number, because the mean of its divisors is an integer number (2463300).

Almost surely, 2^20813272 is an apocalyptic number.

It is an amenable number.

20813272 is a deficient number, since it is larger than the sum of its proper divisors (18599528).

20813272 is a wasteful number, since it uses less digits than its factorization.

20813272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25866 (or 25862 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20813272 is about 4562.1565076179. The cubic root of 20813272 is about 275.0722542923.

The spelling of 20813272 in words is "twenty million, eight hundred thirteen thousand, two hundred seventy-two".