20525623 has 2 divisors, whose sum is σ = 20525624. Its totient is φ = 20525622.

The previous prime is 20525611. The next prime is 20525633. The reversal of 20525623 is 32652502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20525623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20525633) 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 as a sum of consecutive naturals, namely, 10262811 + 10262812.

It is an arithmetic number, because the mean of its divisors is an integer number (10262812).

Almost surely, 2^20525623 is an apocalyptic number.

20525623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525623 is an equidigital number, since it uses as much as digits as its factorization.

20525623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 20525623 is about 4530.5212724365. The cubic root of 20525623 is about 273.7991628584.

The spelling of 20525623 in words is "twenty million, five hundred twenty-five thousand, six hundred twenty-three".