21523322302 has 4 divisors (see below), whose sum is σ = 32284983456. Its totient is φ = 10761661150.

The previous prime is 21523322299. The next prime is 21523322377. The reversal of 21523322302 is 20322332512.

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

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, 5380830574 + ... + 5380830577.

It is an arithmetic number, because the mean of its divisors is an integer number (8071245864).

Almost surely, 2^21523322302 is an apocalyptic number.

21523322302 is a deficient number, since it is larger than the sum of its proper divisors (10761661154).

21523322302 is a wasteful number, since it uses less digits than its factorization.

21523322302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10761661153.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21523322302 its reverse (20322332512), we get a palindrome (41845654814).

The spelling of 21523322302 in words is "twenty-one billion, five hundred twenty-three million, three hundred twenty-two thousand, three hundred two".