21732195055 has 32 divisors (see below), whose sum is σ = 28529639424. Its totient is φ = 15827083776.

The previous prime is 21732195049. The next prime is 21732195059. The reversal of 21732195055 is 55059123712.

It is not a de Polignac number, because 21732195055 - 2³ = 21732195047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21732194999 and 21732195017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21732195059) 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 in 31 ways as a sum of consecutive naturals, for example, 347602 + ... + 405328.

It is an arithmetic number, because the mean of its divisors is an integer number (891551232).

Almost surely, 2^21732195055 is an apocalyptic number.

21732195055 is a deficient number, since it is larger than the sum of its proper divisors (6797444369).

21732195055 is a wasteful number, since it uses less digits than its factorization.

21732195055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57895.

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 21732195055 in words is "twenty-one billion, seven hundred thirty-two million, one hundred ninety-five thousand, fifty-five".