21550504132 has 12 divisors (see below), whose sum is σ = 38633221116. Its totient is φ = 10512440960.

The previous prime is 21550504127. The next prime is 21550504141. The reversal of 21550504132 is 23140505512.

It can be written as a sum of positive squares in 2 ways, for example, as 8153367616 + 13397136516 = 90296^2 + 115746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21550504132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65702593 + ... + 65702920.

It is an arithmetic number, because the mean of its divisors is an integer number (3219435093).

Almost surely, 2^21550504132 is an apocalyptic number.

It is an amenable number.

21550504132 is a deficient number, since it is larger than the sum of its proper divisors (17082716984).

21550504132 is a wasteful number, since it uses less digits than its factorization.

21550504132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131405558 (or 131405556 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 21550504132 in words is "twenty-one billion, five hundred fifty million, five hundred four thousand, one hundred thirty-two".