21609193822 has 8 divisors (see below), whose sum is σ = 32426222400. Its totient is φ = 10800453024.

The previous prime is 21609193763. The next prime is 21609193871. The reversal of 21609193822 is 22839190612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 2065422 + ... + 2075857.

It is an arithmetic number, because the mean of its divisors is an integer number (4053277800).

Almost surely, 2^21609193822 is an apocalyptic number.

21609193822 is a deficient number, since it is larger than the sum of its proper divisors (10817028578).

21609193822 is a wasteful number, since it uses less digits than its factorization.

21609193822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143890.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 21609193822 in words is "twenty-one billion, six hundred nine million, one hundred ninety-three thousand, eight hundred twenty-two".