21110245824809 has 8 divisors (see below), whose sum is σ = 21117437040000. Its totient is φ = 21103055654832.

The previous prime is 21110245824803. The next prime is 21110245824827. The reversal of 21110245824809 is 90842854201112.

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 21110245824809 - 2³² = 21105950857513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110245824803) 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, 41256467 + ... + 41765015.

It is an arithmetic number, because the mean of its divisors is an integer number (2639679630000).

Almost surely, 2^{21110245824809} is an apocalyptic number.

It is an amenable number.

21110245824809 is a deficient number, since it is larger than the sum of its proper divisors (7191215191).

21110245824809 is an equidigital number, since it uses as much as digits as its factorization.

21110245824809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522607.

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 21110245824809 in words is "twenty-one trillion, one hundred ten billion, two hundred forty-five million, eight hundred twenty-four thousand, eight hundred nine".