20873959 has 2 divisors, whose sum is σ = 20873960. Its totient is φ = 20873958.

The previous prime is 20873953. The next prime is 20873999. The reversal of 20873959 is 95937802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20873959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20873953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10436979 + 10436980.

It is an arithmetic number, because the mean of its divisors is an integer number (10436980).

Almost surely, 2^20873959 is an apocalyptic number.

20873959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20873959 is an equidigital number, since it uses as much as digits as its factorization.

20873959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 20873959 is about 4568.8027972326. The cubic root of 20873959 is about 275.3393452689.

The spelling of 20873959 in words is "twenty million, eight hundred seventy-three thousand, nine hundred fifty-nine".