21882278784 has 64 divisors (see below), whose sum is σ = 58170808080. Its totient is φ = 7288320000.

The previous prime is 21882278783. The next prime is 21882278833. The reversal of 21882278784 is 48787228812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21882278783) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 477684 + ... + 521484.

Almost surely, 2^21882278784 is an apocalyptic number.

21882278784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21882278784 is an abundant number, since it is smaller than the sum of its proper divisors (36288529296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21882278784 is a wasteful number, since it uses less digits than its factorization.

21882278784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45119 (or 45107 counting only the distinct ones).

The product of its digits is 6422528, while the sum is 57.

It can be divided in two parts, 218822 and 78784, that added together give a triangular number (297606 = T₇₇₁).

The spelling of 21882278784 in words is "twenty-one billion, eight hundred eighty-two million, two hundred seventy-eight thousand, seven hundred eighty-four".