21022145363 has 4 divisors (see below), whose sum is σ = 21067747008. Its totient is φ = 20976543720.

The previous prime is 21022145299. The next prime is 21022145393. The reversal of 21022145363 is 36354122012.

It is a happy number.

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 21022145363 - 2⁶ = 21022145299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022145393) 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 3 ways as a sum of consecutive naturals, for example, 22800131 + ... + 22801052.

It is an arithmetic number, because the mean of its divisors is an integer number (5266936752).

Almost surely, 2^21022145363 is an apocalyptic number.

21022145363 is a deficient number, since it is larger than the sum of its proper divisors (45601645).

21022145363 is an equidigital number, since it uses as much as digits as its factorization.

21022145363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45601644.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 21022145363 its reverse (36354122012), we get a palindrome (57376267375).

The spelling of 21022145363 in words is "twenty-one billion, twenty-two million, one hundred forty-five thousand, three hundred sixty-three".