20744023 has 2 divisors, whose sum is σ = 20744024. Its totient is φ = 20744022.

The previous prime is 20744021. The next prime is 20744039. The reversal of 20744023 is 32044702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20744023 - 2¹ = 20744021 is a prime.

Together with 20744021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20743985 and 20744003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20744021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10372011 + 10372012.

It is an arithmetic number, because the mean of its divisors is an integer number (10372012).

Almost surely, 2^20744023 is an apocalyptic number.

20744023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20744023 is an equidigital number, since it uses as much as digits as its factorization.

20744023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20744023 is about 4554.5606813391. The cubic root of 20744023 is about 274.7668459063.

Adding to 20744023 its reverse (32044702), we get a palindrome (52788725).

The spelling of 20744023 in words is "twenty million, seven hundred forty-four thousand, twenty-three".