20147272 has 16 divisors (see below), whose sum is σ = 38995200. Its totient is φ = 9748560.

The previous prime is 20147251. The next prime is 20147273. The reversal of 20147272 is 27274102.

It is not an unprimeable number, because it can be changed into a prime (20147273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40372 + ... + 40867.

It is an arithmetic number, because the mean of its divisors is an integer number (2437200).

Almost surely, 2^20147272 is an apocalyptic number.

It is an amenable number.

20147272 is a deficient number, since it is larger than the sum of its proper divisors (18847928).

20147272 is a wasteful number, since it uses less digits than its factorization.

20147272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81276 (or 81272 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20147272 is about 4488.5712648904. The cubic root of 20147272 is about 272.1063958046.

The spelling of 20147272 in words is "twenty million, one hundred forty-seven thousand, two hundred seventy-two".