21244443061 has 8 divisors (see below), whose sum is σ = 21304713600. Its totient is φ = 21184209600.

The previous prime is 21244443053. The next prime is 21244443067. The reversal of 21244443061 is 16034444212.

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 21244443061 - 2³ = 21244443053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244443067) 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, 1460020 + ... + 1474498.

It is an arithmetic number, because the mean of its divisors is an integer number (2663089200).

Almost surely, 2^21244443061 is an apocalyptic number.

It is an amenable number.

21244443061 is a deficient number, since it is larger than the sum of its proper divisors (60270539).

21244443061 is a wasteful number, since it uses less digits than its factorization.

21244443061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18539.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21244443061 its reverse (16034444212), we get a palindrome (37278887273).

The spelling of 21244443061 in words is "twenty-one billion, two hundred forty-four million, four hundred forty-three thousand, sixty-one".