20704272 has 20 divisors (see below), whose sum is σ = 53486160. Its totient is φ = 6901408.

The previous prime is 20704253. The next prime is 20704279. The reversal of 20704272 is 27240702.

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

It is not an unprimeable number, because it can be changed into a prime (20704279) 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, 215622 + ... + 215717.

It is an arithmetic number, because the mean of its divisors is an integer number (2674308).

Almost surely, 2^20704272 is an apocalyptic number.

It is an amenable number.

20704272 is an abundant number, since it is smaller than the sum of its proper divisors (32781888).

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

20704272 is a wasteful number, since it uses less digits than its factorization.

20704272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431350 (or 431344 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 20704272 is about 4550.1947211081. The cubic root of 20704272 is about 274.5912251830.

Adding to 20704272 its reverse (27240702), we get a palindrome (47944974).

The spelling of 20704272 in words is "twenty million, seven hundred four thousand, two hundred seventy-two".