21042113334 has 16 divisors (see below), whose sum is σ = 45910065600. Its totient is φ = 6376397960.

The previous prime is 21042113329. The next prime is 21042113347. The reversal of 21042113334 is 43331124012.

It is a happy number.

It is a congruent 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, 159409884 + ... + 159410015.

It is an arithmetic number, because the mean of its divisors is an integer number (2869379100).

Almost surely, 2^21042113334 is an apocalyptic number.

21042113334 is an abundant number, since it is smaller than the sum of its proper divisors (24867952266).

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

21042113334 is a wasteful number, since it uses less digits than its factorization.

21042113334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318819915.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21042113334 its reverse (43331124012), we get a palindrome (64373237346).

The spelling of 21042113334 in words is "twenty-one billion, forty-two million, one hundred thirteen thousand, three hundred thirty-four".