20272747 has 4 divisors (see below), whose sum is σ = 22115736. Its totient is φ = 18429760.

The previous prime is 20272741. The next prime is 20272751. The reversal of 20272747 is 74727202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20272747 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20272741) 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, 921478 + ... + 921499.

It is an arithmetic number, because the mean of its divisors is an integer number (5528934).

Almost surely, 2^20272747 is an apocalyptic number.

20272747 is a deficient number, since it is larger than the sum of its proper divisors (1842989).

20272747 is a wasteful number, since it uses less digits than its factorization.

20272747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842988.

The product of its (nonzero) digits is 10976, while the sum is 31.

The square root of 20272747 is about 4502.5267350678. The cubic root of 20272747 is about 272.6701100972.

Adding to 20272747 its reverse (74727202), we get a palindrome (94999949).

It can be divided in two parts, 2027 and 2747, that added together give a palindrome (4774).

The spelling of 20272747 in words is "twenty million, two hundred seventy-two thousand, seven hundred forty-seven".