20893959 has 12 divisors (see below), whose sum is σ = 31492656. Its totient is φ = 13323552.

The previous prime is 20893933. The next prime is 20893963. The reversal of 20893959 is 95939802.

It is not a de Polignac number, because 20893959 - 2⁵ = 20893927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20893919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50262 + ... + 50675.

It is an arithmetic number, because the mean of its divisors is an integer number (2624388).

Almost surely, 2^20893959 is an apocalyptic number.

20893959 is a deficient number, since it is larger than the sum of its proper divisors (10598697).

20893959 is a wasteful number, since it uses less digits than its factorization.

20893959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100966 (or 100963 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 20893959 is about 4570.9910304003. The cubic root of 20893959 is about 275.4272543090.

The spelling of 20893959 in words is "twenty million, eight hundred ninety-three thousand, nine hundred fifty-nine".