21411440042 has 16 divisors (see below), whose sum is σ = 32607489600. Its totient is φ = 10543236000.

The previous prime is 21411440027. The next prime is 21411440047. The reversal of 21411440042 is 24004411412.

It is not an unprimeable number, because it can be changed into a prime (21411440047) 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, 194942 + ... + 284297.

It is an arithmetic number, because the mean of its divisors is an integer number (2037968100).

Almost surely, 2^21411440042 is an apocalyptic number.

21411440042 is a deficient number, since it is larger than the sum of its proper divisors (11196049558).

21411440042 is a wasteful number, since it uses less digits than its factorization.

21411440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479581.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21411440042 its reverse (24004411412), we get a palindrome (45415851454).

The spelling of 21411440042 in words is "twenty-one billion, four hundred eleven million, four hundred forty thousand, forty-two".