21444144043 has 8 divisors (see below), whose sum is σ = 24518355680. Its totient is φ = 18372623040.

The previous prime is 21444143977. The next prime is 21444144053. The reversal of 21444144043 is 34044144412.

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 21444144043 - 2²¹ = 21442046891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444143996 and 21444144014.

It is not an unprimeable number, because it can be changed into a prime (21444144053) 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, 655548 + ... + 687481.

It is an arithmetic number, because the mean of its divisors is an integer number (3064794460).

Almost surely, 2^21444144043 is an apocalyptic number.

21444144043 is a deficient number, since it is larger than the sum of its proper divisors (3074211637).

21444144043 is a wasteful number, since it uses less digits than its factorization.

21444144043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345317.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21444144043 its reverse (34044144412), we get a palindrome (55488288455).

The spelling of 21444144043 in words is "twenty-one billion, four hundred forty-four million, one hundred forty-four thousand, forty-three".