21899956098 has 32 divisors (see below), whose sum is σ = 43938417600. Its totient is φ = 7276939776.

The previous prime is 21899956061. The next prime is 21899956103. The reversal of 21899956098 is 89065999812.

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 15 ways as a sum of consecutive naturals, for example, 2625198 + ... + 2633526.

It is an arithmetic number, because the mean of its divisors is an integer number (1373075550).

Almost surely, 2^21899956098 is an apocalyptic number.

21899956098 is an abundant number, since it is smaller than the sum of its proper divisors (22038461502).

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

21899956098 is a wasteful number, since it uses less digits than its factorization.

21899956098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9666.

The product of its (nonzero) digits is 25194240, while the sum is 66.

The spelling of 21899956098 in words is "twenty-one billion, eight hundred ninety-nine million, nine hundred fifty-six thousand, ninety-eight".