21696228011 has 8 divisors (see below), whose sum is σ = 21832952064. Its totient is φ = 21559585320.

The previous prime is 21696227981. The next prime is 21696228023. The reversal of 21696228011 is 11082269612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21696228011 is a prime.

It is a super-2 number, since 2×21696228011² (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 (21696225011) 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, 567836 + ... + 604838.

It is an arithmetic number, because the mean of its divisors is an integer number (2729119008).

Almost surely, 2^21696228011 is an apocalyptic number.

21696228011 is a deficient number, since it is larger than the sum of its proper divisors (136724053).

21696228011 is a wasteful number, since it uses less digits than its factorization.

21696228011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40681.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 21696228011 in words is "twenty-one billion, six hundred ninety-six million, two hundred twenty-eight thousand, eleven".