21304423034 has 16 divisors (see below), whose sum is σ = 32944594536. Its totient is φ = 10326201600.

The previous prime is 21304423031. The next prime is 21304423061. The reversal of 21304423034 is 43032440312.

It can be written as a sum of positive squares in 4 ways, for example, as 12702417025 + 8602006009 = 112705^2 + 92747^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21304422994 and 21304423012.

It is not an unprimeable number, because it can be changed into a prime (21304423031) 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, 814547 + ... + 840294.

Almost surely, 2^21304423034 is an apocalyptic number.

21304423034 is a deficient number, since it is larger than the sum of its proper divisors (11640171502).

21304423034 is a wasteful number, since it uses less digits than its factorization.

21304423034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655041.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21304423034 its reverse (43032440312), we get a palindrome (64336863346).

The spelling of 21304423034 in words is "twenty-one billion, three hundred four million, four hundred twenty-three thousand, thirty-four".