20972023 has 2 divisors, whose sum is σ = 20972024. Its totient is φ = 20972022.

The previous prime is 20971997. The next prime is 20972041. The reversal of 20972023 is 32027902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20972023 - 2¹⁷ = 20840951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20972053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10486011 + 10486012.

It is an arithmetic number, because the mean of its divisors is an integer number (10486012).

Almost surely, 2^20972023 is an apocalyptic number.

20972023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20972023 is an equidigital number, since it uses as much as digits as its factorization.

20972023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20972023 is about 4579.5221366426. The cubic root of 20972023 is about 275.7698450604.

Adding to 20972023 its reverse (32027902), we get a palindrome (52999925).

The spelling of 20972023 in words is "twenty million, nine hundred seventy-two thousand, twenty-three".