20272005 has 32 divisors (see below), whose sum is σ = 38814720. Its totient is φ = 9979200.

The previous prime is 20271983. The next prime is 20272009. The reversal of 20272005 is 50027202.

It is a happy number.

It is not a de Polignac number, because 20272005 - 2⁸ = 20271749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20272009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4021 + ... + 7530.

It is an arithmetic number, because the mean of its divisors is an integer number (1212960).

Almost surely, 2^20272005 is an apocalyptic number.

It is an amenable number.

20272005 is a deficient number, since it is larger than the sum of its proper divisors (18542715).

20272005 is a wasteful number, since it uses less digits than its factorization.

20272005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11578 (or 11572 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 20272005 is about 4502.4443361357. Note that the first 3 decimals coincide. The cubic root of 20272005 is about 272.6667834030. Note that the first 3 decimals are identical.

Adding to 20272005 its reverse (50027202), we get a palindrome (70299207).

The spelling of 20272005 in words is "twenty million, two hundred seventy-two thousand, five".