21832647293 has 4 divisors (see below), whose sum is σ = 21992009820. Its totient is φ = 21673284768.

The previous prime is 21832647289. The next prime is 21832647329. The reversal of 21832647293 is 39274623812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16582485529 + 5250161764 = 128773^2 + 72458^2 .

It is a cyclic number.

It is not a de Polignac number, because 21832647293 - 2² = 21832647289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21832644293) 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, 79681058 + ... + 79681331.

It is an arithmetic number, because the mean of its divisors is an integer number (5498002455).

Almost surely, 2^21832647293 is an apocalyptic number.

It is an amenable number.

21832647293 is a deficient number, since it is larger than the sum of its proper divisors (159362527).

21832647293 is a wasteful number, since it uses less digits than its factorization.

21832647293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159362526.

The product of its digits is 870912, while the sum is 47.

The spelling of 21832647293 in words is "twenty-one billion, eight hundred thirty-two million, six hundred forty-seven thousand, two hundred ninety-three".