21896019221 has 8 divisors (see below), whose sum is σ = 22000898304. Its totient is φ = 21791200320.

The previous prime is 21896019179. The next prime is 21896019247. The reversal of 21896019221 is 12291069812.

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 21896019221 - 2⁶ = 21896019157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21896019281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 825650 + ... + 851756.

It is an arithmetic number, because the mean of its divisors is an integer number (2750112288).

Almost surely, 2^21896019221 is an apocalyptic number.

It is an amenable number.

21896019221 is a deficient number, since it is larger than the sum of its proper divisors (104879083).

21896019221 is a wasteful number, since it uses less digits than its factorization.

21896019221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30091.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 21896019221 in words is "twenty-one billion, eight hundred ninety-six million, nineteen thousand, two hundred twenty-one".