20936459 has 2 divisors, whose sum is σ = 20936460. Its totient is φ = 20936458.

The previous prime is 20936453. The next prime is 20936471. The reversal of 20936459 is 95463902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20936459 - 2¹² = 20932363 is a prime.

It is not a weakly prime, because it can be changed into another prime (20936453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10468229 + 10468230.

It is an arithmetic number, because the mean of its divisors is an integer number (10468230).

Almost surely, 2^20936459 is an apocalyptic number.

20936459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20936459 is an equidigital number, since it uses as much as digits as its factorization.

20936459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 20936459 is about 4575.6375512053. The cubic root of 20936459 is about 275.6138749253.

The spelling of 20936459 in words is "twenty million, nine hundred thirty-six thousand, four hundred fifty-nine".