21235694217089 has 8 divisors (see below), whose sum is σ = 23395580308800. Its totient is φ = 19114036198000.

The previous prime is 21235694217079. The next prime is 21235694217121. The reversal of 21235694217089 is 98071249653212.

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 21235694217089 - 2²⁰ = 21235693168513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21235694217019) 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, 9557016989 + ... + 9557019210.

It is an arithmetic number, because the mean of its divisors is an integer number (2924447538600).

It is a 1-persistent number, because it is pandigital, but 2⋅21235694217089 = 42471388434178 is not.

Almost surely, 2^{21235694217089} is an apocalyptic number.

It is an amenable number.

21235694217089 is a deficient number, since it is larger than the sum of its proper divisors (2159886091711).

21235694217089 is a wasteful number, since it uses less digits than its factorization.

21235694217089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19114036311.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 21235694217089 in words is "twenty-one trillion, two hundred thirty-five billion, six hundred ninety-four million, two hundred seventeen thousand, eighty-nine".