21696228049 has 8 divisors (see below), whose sum is σ = 23166044352. Its totient is φ = 20270286960.

The previous prime is 21696228023. The next prime is 21696228089. The reversal of 21696228049 is 94082269612.

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 21696228049 - 2¹⁵ = 21696195281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21696227993 and 21696228011.

It is not an unprimeable number, because it can be changed into a prime (21696228089) 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, 10967782 + ... + 10969759.

It is an arithmetic number, because the mean of its divisors is an integer number (2895755544).

Almost surely, 2^21696228049 is an apocalyptic number.

It is an amenable number.

21696228049 is a deficient number, since it is larger than the sum of its proper divisors (1469816303).

21696228049 is a wasteful number, since it uses less digits than its factorization.

21696228049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21937607.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 21696228049 in words is "twenty-one billion, six hundred ninety-six million, two hundred twenty-eight thousand, forty-nine".