21042242334 has 12 divisors (see below), whose sum is σ = 45591525096. Its totient is φ = 7014080772.

The previous prime is 21042242311. The next prime is 21042242357. The reversal of 21042242334 is 43324224012.

21042242334 is a `hidden beast` number, since 2 + 1 + 0 + 422 + 4 + 233 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21042242311) and next prime (21042242357).

It is a junction number, because it is equal to n+sod(n) for n = 21042242298 and 21042242307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 584506714 + ... + 584506749.

It is an arithmetic number, because the mean of its divisors is an integer number (3799293758).

Almost surely, 2^21042242334 is an apocalyptic number.

21042242334 is an abundant number, since it is smaller than the sum of its proper divisors (24549282762).

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

21042242334 is a wasteful number, since it uses less digits than its factorization.

21042242334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169013471 (or 1169013468 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21042242334 its reverse (43324224012), we get a palindrome (64366466346).

The spelling of 21042242334 in words is "twenty-one billion, forty-two million, two hundred forty-two thousand, three hundred thirty-four".