20968263 has 6 divisors (see below), whose sum is σ = 30287504. Its totient is φ = 13978836.

The previous prime is 20968237. The next prime is 20968271. The reversal of 20968263 is 36286902.

It is not a de Polignac number, because 20968263 - 2⁸ = 20968007 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 (20968223) 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 5 ways as a sum of consecutive naturals, for example, 1164895 + ... + 1164912.

Almost surely, 2^20968263 is an apocalyptic number.

20968263 is a deficient number, since it is larger than the sum of its proper divisors (9319241).

20968263 is a wasteful number, since it uses less digits than its factorization.

20968263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329813 (or 2329810 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 20968263 is about 4579.1115950586. Note that the first 3 decimals coincide. The cubic root of 20968263 is about 275.7533634746.

The spelling of 20968263 in words is "twenty million, nine hundred sixty-eight thousand, two hundred sixty-three".