21882679388 has 6 divisors (see below), whose sum is σ = 38294688936. Its totient is φ = 10941339692.

The previous prime is 21882679331. The next prime is 21882679447. The reversal of 21882679388 is 88397628812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21882679388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2735334920 + ... + 2735334927.

It is an arithmetic number, because the mean of its divisors is an integer number (6382448156).

Almost surely, 2^21882679388 is an apocalyptic number.

It is an amenable number.

21882679388 is a deficient number, since it is larger than the sum of its proper divisors (16412009548).

21882679388 is a wasteful number, since it uses less digits than its factorization.

21882679388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5470669851 (or 5470669849 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 62.

The spelling of 21882679388 in words is "twenty-one billion, eight hundred eighty-two million, six hundred seventy-nine thousand, three hundred eighty-eight".