21244442411 has 8 divisors (see below), whose sum is σ = 22972714560. Its totient is φ = 19569347968.

The previous prime is 21244442399. The next prime is 21244442441. The reversal of 21244442411 is 11424444212.

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 21244442411 - 2⁶ = 21244442347 is a prime.

It is a super-4 number, since 4×21244442411⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21244442441) 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, 13293596 + ... + 13295193.

It is an arithmetic number, because the mean of its divisors is an integer number (2871589320).

Almost surely, 2^21244442411 is an apocalyptic number.

21244442411 is a deficient number, since it is larger than the sum of its proper divisors (1728272149).

21244442411 is a wasteful number, since it uses less digits than its factorization.

21244442411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26588853.

The product of its digits is 8192, while the sum is 29.

Adding to 21244442411 its reverse (11424444212), we get a palindrome (32668886623).

The spelling of 21244442411 in words is "twenty-one billion, two hundred forty-four million, four hundred forty-two thousand, four hundred eleven".