21133899169 has 8 divisors (see below), whose sum is σ = 21421013760. Its totient is φ = 20847274656.

The previous prime is 21133899133. The next prime is 21133899221. The reversal of 21133899169 is 96199833112.

It is a happy number.

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 21133899169 - 2⁷ = 21133899041 is a prime.

It is a super-2 number, since 2×21133899169² (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 (21133899109) 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, 35269 + ... + 208594.

It is an arithmetic number, because the mean of its divisors is an integer number (2677626720).

Almost surely, 2^21133899169 is an apocalyptic number.

It is an amenable number.

21133899169 is a deficient number, since it is larger than the sum of its proper divisors (287114591).

21133899169 is a wasteful number, since it uses less digits than its factorization.

21133899169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245039.

The product of its digits is 629856, while the sum is 52.

The spelling of 21133899169 in words is "twenty-one billion, one hundred thirty-three million, eight hundred ninety-nine thousand, one hundred sixty-nine".