21623522210006 has 4 divisors (see below), whose sum is σ = 32435283315012. Its totient is φ = 10811761105002.

The previous prime is 21623522209999. The next prime is 21623522210009. The reversal of 21623522210006 is 60001222532612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623522210009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5405880552500 + ... + 5405880552503.

It is an arithmetic number, because the mean of its divisors is an integer number (8108820828753).

Almost surely, 2^{21623522210006} is an apocalyptic number.

21623522210006 is a deficient number, since it is larger than the sum of its proper divisors (10811761105006).

21623522210006 is a wasteful number, since it uses less digits than its factorization.

21623522210006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10811761105005.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21623522210006 its reverse (60001222532612), we get a palindrome (81624744742618).

The spelling of 21623522210006 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred twenty-two million, two hundred ten thousand, six".