20313959 has 4 divisors (see below), whose sum is σ = 20969280. Its totient is φ = 19658640.

The previous prime is 20313941. The next prime is 20313961. The reversal of 20313959 is 95931302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95931302 = 2 ⋅47965651.

It is a cyclic number.

It is not a de Polignac number, because 20313959 - 2²⁰ = 19265383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327614 + ... + 327675.

It is an arithmetic number, because the mean of its divisors is an integer number (5242320).

Almost surely, 2^20313959 is an apocalyptic number.

20313959 is a deficient number, since it is larger than the sum of its proper divisors (655321).

20313959 is an equidigital number, since it uses as much as digits as its factorization.

20313959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655320.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 20313959 is about 4507.1009529408. The cubic root of 20313959 is about 272.8547532949.

The spelling of 20313959 in words is "twenty million, three hundred thirteen thousand, nine hundred fifty-nine".