20959763 has 4 divisors (see below), whose sum is σ = 22865208. Its totient is φ = 19054320.

The previous prime is 20959711. The next prime is 20959777. The reversal of 20959763 is 36795902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20959763 - 2¹² = 20955667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20959763.

It is not an unprimeable number, because it can be changed into a prime (20959703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952706 + ... + 952727.

It is an arithmetic number, because the mean of its divisors is an integer number (5716302).

Almost surely, 2^20959763 is an apocalyptic number.

20959763 is a deficient number, since it is larger than the sum of its proper divisors (1905445).

20959763 is a wasteful number, since it uses less digits than its factorization.

20959763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905444.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 20959763 is about 4578.1833733480. The cubic root of 20959763 is about 275.7160973074.

The spelling of 20959763 in words is "twenty million, nine hundred fifty-nine thousand, seven hundred sixty-three".