20625023 has 2 divisors, whose sum is σ = 20625024. Its totient is φ = 20625022.

The previous prime is 20625019. The next prime is 20625041. The reversal of 20625023 is 32052602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20625023 - 2² = 20625019 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20624986 and 20625004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20625823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312511 + 10312512.

It is an arithmetic number, because the mean of its divisors is an integer number (10312512).

Almost surely, 2^20625023 is an apocalyptic number.

20625023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625023 is an equidigital number, since it uses as much as digits as its factorization.

20625023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20625023 is about 4541.4780633622. The cubic root of 20625023 is about 274.2404295614.

Adding to 20625023 its reverse (32052602), we get a palindrome (52677625).

The spelling of 20625023 in words is "twenty million, six hundred twenty-five thousand, twenty-three".