20948959 has 2 divisors, whose sum is σ = 20948960. Its totient is φ = 20948958.

The previous prime is 20948927. The next prime is 20948969. The reversal of 20948959 is 95984902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20948959 - 2⁵ = 20948927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20948969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10474479 + 10474480.

It is an arithmetic number, because the mean of its divisors is an integer number (10474480).

Almost surely, 2^20948959 is an apocalyptic number.

20948959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20948959 is an equidigital number, since it uses as much as digits as its factorization.

20948959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 20948959 is about 4577.0032772547. The cubic root of 20948959 is about 275.6687152721.

The spelling of 20948959 in words is "twenty million, nine hundred forty-eight thousand, nine hundred fifty-nine".