20901259 has 2 divisors, whose sum is σ = 20901260. Its totient is φ = 20901258.

The previous prime is 20901247. The next prime is 20901277. The reversal of 20901259 is 95210902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20901259 - 2¹¹ = 20899211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20901289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450629 + 10450630.

It is an arithmetic number, because the mean of its divisors is an integer number (10450630).

Almost surely, 2^20901259 is an apocalyptic number.

20901259 is a deficient number, since it is larger than the sum of its proper divisors (1).

20901259 is an equidigital number, since it uses as much as digits as its factorization.

20901259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20901259 is about 4571.7894745931. The cubic root of 20901259 is about 275.4593271335.

The spelling of 20901259 in words is "twenty million, nine hundred one thousand, two hundred fifty-nine".