20525459 has 2 divisors, whose sum is σ = 20525460. Its totient is φ = 20525458.

The previous prime is 20525437. The next prime is 20525497. The reversal of 20525459 is 95452502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20525459 - 2²⁴ = 3748243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20525419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262729 + 10262730.

It is an arithmetic number, because the mean of its divisors is an integer number (10262730).

Almost surely, 2^20525459 is an apocalyptic number.

20525459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525459 is an equidigital number, since it uses as much as digits as its factorization.

20525459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 20525459 is about 4530.5031729379. The cubic root of 20525459 is about 273.7984336368.

The spelling of 20525459 in words is "twenty million, five hundred twenty-five thousand, four hundred fifty-nine".