20394272 has 12 divisors (see below), whose sum is σ = 40151286. Its totient is φ = 10197120.

The previous prime is 20394263. The next prime is 20394299. The reversal of 20394272 is 27249302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 16 = 4516^2 + 4^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318629 + ... + 318692.

Almost surely, 2^20394272 is an apocalyptic number.

It is an amenable number.

20394272 is a deficient number, since it is larger than the sum of its proper divisors (19757014).

20394272 is an equidigital number, since it uses as much as digits as its factorization.

20394272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637331 (or 637323 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20394272 is about 4516.0017714788. The cubic root of 20394272 is about 273.2138654325.

The spelling of 20394272 in words is "twenty million, three hundred ninety-four thousand, two hundred seventy-two".