21771892088 has 16 divisors (see below), whose sum is σ = 41226480360. Its totient is φ = 10778164000.

The previous prime is 21771892003. The next prime is 21771892091. The reversal of 21771892088 is 88029817712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13471898 + ... + 13473513.

Almost surely, 2^21771892088 is an apocalyptic number.

It is an amenable number.

21771892088 is a deficient number, since it is larger than the sum of its proper divisors (19454588272).

21771892088 is a wasteful number, since it uses less digits than its factorization.

21771892088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945518 (or 26945514 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 53.

The spelling of 21771892088 in words is "twenty-one billion, seven hundred seventy-one million, eight hundred ninety-two thousand, eighty-eight".