21836329792 has 14 divisors (see below), whose sum is σ = 43331467058. Its totient is φ = 10918164864.

The previous prime is 21836329787. The next prime is 21836329793. The reversal of 21836329792 is 29792363812.

It can be written as a sum of positive squares in only one way, i.e., 15419678976 + 6416650816 = 124176^2 + 80104^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21836329793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170596263 + ... + 170596390.

Almost surely, 2^21836329792 is an apocalyptic number.

It is an amenable number.

21836329792 is a deficient number, since it is larger than the sum of its proper divisors (21495137266).

21836329792 is an equidigital number, since it uses as much as digits as its factorization.

21836329792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341192665 (or 341192655 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The spelling of 21836329792 in words is "twenty-one billion, eight hundred thirty-six million, three hundred twenty-nine thousand, seven hundred ninety-two".