21828785267 has 8 divisors (see below), whose sum is σ = 22388035824. Its totient is φ = 21271880448.

The previous prime is 21828785219. The next prime is 21828785299. The reversal of 21828785267 is 76258782812.

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 21828785267 - 2¹⁴ = 21828768883 is a prime.

It is a super-2 number, since 2×21828785267² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21828485267) 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, 567578 + ... + 604815.

It is an arithmetic number, because the mean of its divisors is an integer number (2798504478).

Almost surely, 2^21828785267 is an apocalyptic number.

21828785267 is a deficient number, since it is larger than the sum of its proper divisors (559250557).

21828785267 is a wasteful number, since it uses less digits than its factorization.

21828785267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172869.

The product of its digits is 6021120, while the sum is 56.

The spelling of 21828785267 in words is "twenty-one billion, eight hundred twenty-eight million, seven hundred eighty-five thousand, two hundred sixty-seven".