20522963 has 4 divisors (see below), whose sum is σ = 20584200. Its totient is φ = 20461728.

The previous prime is 20522951. The next prime is 20522977. The reversal of 20522963 is 36922502.

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 20522963 - 2²⁰ = 19474387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522363) 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, 30113 + ... + 30786.

It is an arithmetic number, because the mean of its divisors is an integer number (5146050).

Almost surely, 2^20522963 is an apocalyptic number.

20522963 is a deficient number, since it is larger than the sum of its proper divisors (61237).

20522963 is an equidigital number, since it uses as much as digits as its factorization.

20522963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61236.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 20522963 is about 4530.2276984717. The cubic root of 20522963 is about 273.7873347605.

The spelling of 20522963 in words is "twenty million, five hundred twenty-two thousand, nine hundred sixty-three".