21444401043 has 36 divisors (see below), whose sum is σ = 34321376232. Its totient is φ = 12889618560.

The previous prime is 21444401021. The next prime is 21444401071. The reversal of 21444401043 is 34010444412.

21444401043 is a `hidden beast` number, since 214 + 4 + 4 + 401 + 0 + 43 = 666.

It is not a de Polignac number, because 21444401043 - 2¹² = 21444396947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21444400998 and 21444401016.

It is not an unprimeable number, because it can be changed into a prime (21444402043) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 98538 + ... + 229343.

It is an arithmetic number, because the mean of its divisors is an integer number (953371562).

Almost surely, 2^21444401043 is an apocalyptic number.

21444401043 is a deficient number, since it is larger than the sum of its proper divisors (12876975189).

21444401043 is a wasteful number, since it uses less digits than its factorization.

21444401043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327956 (or 327940 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21444401043 its reverse (34010444412), we get a palindrome (55454845455).

The spelling of 21444401043 in words is "twenty-one billion, four hundred forty-four million, four hundred one thousand, forty-three".