21643362292 has 6 divisors (see below), whose sum is σ = 37875884018. Its totient is φ = 10821681144.

The previous prime is 21643362259. The next prime is 21643362317. The reversal of 21643362292 is 29226334612.

It can be written as a sum of positive squares in only one way, i.e., 18000515556 + 3642846736 = 134166^2 + 60356^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2705420283 + ... + 2705420290.

Almost surely, 2^21643362292 is an apocalyptic number.

It is an amenable number.

21643362292 is a deficient number, since it is larger than the sum of its proper divisors (16232521726).

21643362292 is a wasteful number, since it uses less digits than its factorization.

21643362292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410840577 (or 5410840575 counting only the distinct ones).

The product of its digits is 186624, while the sum is 40.

The spelling of 21643362292 in words is "twenty-one billion, six hundred forty-three million, three hundred sixty-two thousand, two hundred ninety-two".