21500032422541 has 4 divisors (see below), whose sum is σ = 21520725428800. Its totient is φ = 21479339416284.

The previous prime is 21500032422493. The next prime is 21500032422587. The reversal of 21500032422541 is 14522423000512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21500032422541 - 2²³ = 21500024033933 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 (21500032420541) 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, 10346501571 + ... + 10346503648.

It is an arithmetic number, because the mean of its divisors is an integer number (5380181357200).

Almost surely, 2^{21500032422541} is an apocalyptic number.

It is an amenable number.

21500032422541 is a deficient number, since it is larger than the sum of its proper divisors (20693006259).

21500032422541 is a wasteful number, since it uses less digits than its factorization.

21500032422541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20693006258.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 21500032422541 in words is "twenty-one trillion, five hundred billion, thirty-two million, four hundred twenty-two thousand, five hundred forty-one".