21042314434 has 8 divisors (see below), whose sum is σ = 33420146508. Its totient is φ = 9902265600.

The previous prime is 21042314429. The next prime is 21042314443. The reversal of 21042314434 is 43441324012.

It can be written as a sum of positive squares in 2 ways, for example, as 19837877409 + 1204437025 = 140847^2 + 34705^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309445767 + ... + 309445834.

Almost surely, 2^21042314434 is an apocalyptic number.

21042314434 is a deficient number, since it is larger than the sum of its proper divisors (12377832074).

21042314434 is a wasteful number, since it uses less digits than its factorization.

21042314434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618891620.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21042314434 its reverse (43441324012), we get a palindrome (64483638446).

The spelling of 21042314434 in words is "twenty-one billion, forty-two million, three hundred fourteen thousand, four hundred thirty-four".