21822937919 has 4 divisors (see below), whose sum is σ = 21823965240. Its totient is φ = 21821910600.

The previous prime is 21822937879. The next prime is 21822937931. The reversal of 21822937919 is 91973922812.

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 21822937919 - 2⁸ = 21822937663 is a prime.

It is a super-2 number, since 2×21822937919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822937999) 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, 481109 + ... + 524510.

It is an arithmetic number, because the mean of its divisors is an integer number (5455991310).

Almost surely, 2^21822937919 is an apocalyptic number.

21822937919 is a deficient number, since it is larger than the sum of its proper divisors (1027321).

21822937919 is a wasteful number, since it uses less digits than its factorization.

21822937919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027320.

The product of its digits is 979776, while the sum is 53.

The spelling of 21822937919 in words is "twenty-one billion, eight hundred twenty-two million, nine hundred thirty-seven thousand, nine hundred nineteen".