20272723 has 4 divisors (see below), whose sum is σ = 20282920. Its totient is φ = 20262528.

The previous prime is 20272699. The next prime is 20272741. The reversal of 20272723 is 32727202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32727202 = 2 ⋅16363601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20272723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20272783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1038 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (5070730).

Almost surely, 2^20272723 is an apocalyptic number.

20272723 is a deficient number, since it is larger than the sum of its proper divisors (10197).

20272723 is an equidigital number, since it uses as much as digits as its factorization.

20272723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10196.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 20272723 is about 4502.5240698968. The cubic root of 20272723 is about 272.6700024965.

Adding to 20272723 its reverse (32727202), we get a palindrome (52999925).

The spelling of 20272723 in words is "twenty million, two hundred seventy-two thousand, seven hundred twenty-three".