21980896091 has 8 divisors (see below), whose sum is σ = 27404753664. Its totient is φ = 17127970920.

The previous prime is 21980896081. The next prime is 21980896103. The reversal of 21980896091 is 19069808912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21980896091 - 2¹⁰ = 21980895067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21980896001) 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, 142733015 + ... + 142733168.

It is an arithmetic number, because the mean of its divisors is an integer number (3425594208).

Almost surely, 2^21980896091 is an apocalyptic number.

21980896091 is a deficient number, since it is larger than the sum of its proper divisors (5423857573).

21980896091 is a wasteful number, since it uses less digits than its factorization.

21980896091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285466201.

The product of its (nonzero) digits is 559872, while the sum is 53.

The spelling of 21980896091 in words is "twenty-one billion, nine hundred eighty million, eight hundred ninety-six thousand, ninety-one".