22001963 has 4 divisors (see below), whose sum is σ = 22011720. Its totient is φ = 21992208.

The previous prime is 22001897. The next prime is 22001989. The reversal of 22001963 is 36910022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22001963 - 2¹⁰ = 22000939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22000963) 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, 431 + ... + 6647.

It is an arithmetic number, because the mean of its divisors is an integer number (5502930).

Almost surely, 2^22001963 is an apocalyptic number.

22001963 is a deficient number, since it is larger than the sum of its proper divisors (9757).

22001963 is an equidigital number, since it uses as much as digits as its factorization.

22001963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 22001963 is about 4690.6250116589. The cubic root of 22001963 is about 280.2122667619.

Adding to 22001963 its reverse (36910022), we get a palindrome (58911985).

The spelling of 22001963 in words is "twenty-two million, one thousand, nine hundred sixty-three".