20045272 has 16 divisors (see below), whose sum is σ = 40476240. Its totient is φ = 9251616.

The previous prime is 20045257. The next prime is 20045279. The reversal of 20045272 is 27254002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045279) 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, 96268 + ... + 96475.

It is an arithmetic number, because the mean of its divisors is an integer number (2529765).

Almost surely, 2^20045272 is an apocalyptic number.

It is an amenable number.

20045272 is an abundant number, since it is smaller than the sum of its proper divisors (20430968).

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

20045272 is a wasteful number, since it uses less digits than its factorization.

20045272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192762 (or 192758 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20045272 is about 4477.1946573720. The cubic root of 20045272 is about 271.6464191734.

Adding to 20045272 its reverse (27254002), we get a palindrome (47299274).

The spelling of 20045272 in words is "twenty million, forty-five thousand, two hundred seventy-two".