21112411434 has 16 divisors (see below), whose sum is σ = 42699260160. Its totient is φ = 6958397600.

The previous prime is 21112411429. The next prime is 21112411451. The reversal of 21112411434 is 43411421112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19767642 + ... + 19768709.

It is an arithmetic number, because the mean of its divisors is an integer number (2668703760).

Almost surely, 2^21112411434 is an apocalyptic number.

21112411434 is an abundant number, since it is smaller than the sum of its proper divisors (21586848726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112411434 is a wasteful number, since it uses less digits than its factorization.

21112411434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39536445.

The product of its digits is 768, while the sum is 24.

Adding to 21112411434 its reverse (43411421112), we get a palindrome (64523832546).

The spelling of 21112411434 in words is "twenty-one billion, one hundred twelve million, four hundred eleven thousand, four hundred thirty-four".