21442013043 has 8 divisors (see below), whose sum is σ = 31188382656. Its totient is φ = 12995159400.

The previous prime is 21442013041. The next prime is 21442013053. The reversal of 21442013043 is 34031024412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21442013043 - 2¹ = 21442013041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442013041) 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, 324878953 + ... + 324879018.

It is an arithmetic number, because the mean of its divisors is an integer number (3898547832).

Almost surely, 2^21442013043 is an apocalyptic number.

21442013043 is a deficient number, since it is larger than the sum of its proper divisors (9746369613).

21442013043 is a wasteful number, since it uses less digits than its factorization.

21442013043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649757985.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21442013043 its reverse (34031024412), we get a palindrome (55473037455).

The spelling of 21442013043 in words is "twenty-one billion, four hundred forty-two million, thirteen thousand, forty-three".