21882066278 has 16 divisors (see below), whose sum is σ = 34811673696. Its totient is φ = 10293771840.

The previous prime is 21882066277. The next prime is 21882066343. The reversal of 21882066278 is 87266028812.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21882066277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3896351 + ... + 3901962.

It is an arithmetic number, because the mean of its divisors is an integer number (2175729606).

Almost surely, 2^21882066278 is an apocalyptic number.

21882066278 is a deficient number, since it is larger than the sum of its proper divisors (12929607418).

21882066278 is a wasteful number, since it uses less digits than its factorization.

21882066278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798399.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 21882066278 in words is "twenty-one billion, eight hundred eighty-two million, sixty-six thousand, two hundred seventy-eight".