21882488845 has 12 divisors (see below), whose sum is σ = 30546168444. Its totient is φ = 15005135040.

The previous prime is 21882488821. The next prime is 21882488867. The reversal of 21882488845 is 54888428812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8401188964 + 13481299881 = 91658^2 + 116109^2 .

It is not a de Polignac number, because 21882488845 - 2¹⁷ = 21882357773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21882488845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44657896 + ... + 44658385.

It is an arithmetic number, because the mean of its divisors is an integer number (2545514037).

Almost surely, 2^21882488845 is an apocalyptic number.

It is an amenable number.

21882488845 is a deficient number, since it is larger than the sum of its proper divisors (8663679599).

21882488845 is an equidigital number, since it uses as much as digits as its factorization.

21882488845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89316300 (or 89316293 counting only the distinct ones).

The product of its digits is 10485760, while the sum is 58.

The spelling of 21882488845 in words is "twenty-one billion, eight hundred eighty-two million, four hundred eighty-eight thousand, eight hundred forty-five".