21899855008308 has 24 divisors (see below), whose sum is σ = 51099740664448. Its totient is φ = 7299940386816.

The previous prime is 21899855008267. The next prime is 21899855008337. The reversal of 21899855008308 is 80380055899812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11156085 + ... + 12971427.

Almost surely, 2^{21899855008308} is an apocalyptic number.

It is an amenable number.

21899855008308 is an abundant number, since it is smaller than the sum of its proper divisors (29199885656140).

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

21899855008308 is a wasteful number, since it uses less digits than its factorization.

21899855008308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820663 (or 2820661 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 66.

The spelling of 21899855008308 in words is "twenty-one trillion, eight hundred ninety-nine billion, eight hundred fifty-five million, eight thousand, three hundred eight".