21222738895 has 8 divisors (see below), whose sum is σ = 25478654256. Its totient is φ = 16970612736.

The previous prime is 21222738893. The next prime is 21222738913. The reversal of 21222738895 is 59883722212.

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 21222738895 - 2¹ = 21222738893 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 (21222738893) 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, 934962 + ... + 957391.

It is an arithmetic number, because the mean of its divisors is an integer number (3184831782).

Almost surely, 2^21222738895 is an apocalyptic number.

21222738895 is a deficient number, since it is larger than the sum of its proper divisors (4255915361).

21222738895 is a wasteful number, since it uses less digits than its factorization.

21222738895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894601.

The product of its digits is 967680, while the sum is 49.

The spelling of 21222738895 in words is "twenty-one billion, two hundred twenty-two million, seven hundred thirty-eight thousand, eight hundred ninety-five".