21819222763 has 12 divisors (see below), whose sum is σ = 23633198280. Its totient is φ = 20135309376.

The previous prime is 21819222743. The next prime is 21819222779. The reversal of 21819222763 is 36722291812.

It is not a de Polignac number, because 21819222763 - 2²⁹ = 21282351851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21819222743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683895 + ... + 715087.

It is an arithmetic number, because the mean of its divisors is an integer number (1969433190).

Almost surely, 2^21819222763 is an apocalyptic number.

21819222763 is a deficient number, since it is larger than the sum of its proper divisors (1813975517).

21819222763 is a wasteful number, since it uses less digits than its factorization.

21819222763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35358 (or 35345 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The spelling of 21819222763 in words is "twenty-one billion, eight hundred nineteen million, two hundred twenty-two thousand, seven hundred sixty-three".