20450963 has 4 divisors (see below), whose sum is σ = 22024128. Its totient is φ = 18877800.

The previous prime is 20450939. The next prime is 20450981. The reversal of 20450963 is 36905402.

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 20450963 - 2²⁰ = 19402387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20450063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786563 + ... + 786588.

It is an arithmetic number, because the mean of its divisors is an integer number (5506032).

Almost surely, 2^20450963 is an apocalyptic number.

20450963 is a deficient number, since it is larger than the sum of its proper divisors (1573165).

20450963 is a wasteful number, since it uses less digits than its factorization.

20450963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573164.

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

The square root of 20450963 is about 4522.2740960716. The cubic root of 20450963 is about 273.4667867385.

The spelling of 20450963 in words is "twenty million, four hundred fifty thousand, nine hundred sixty-three".