21423230034 has 32 divisors (see below), whose sum is σ = 46043971776. Its totient is φ = 6620697600.

The previous prime is 21423229981. The next prime is 21423230053. The reversal of 21423230034 is 43003232412.

It is a junction number, because it is equal to n+sod(n) for n = 21423229986 and 21423230013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560567 + ... + 1574234.

It is an arithmetic number, because the mean of its divisors is an integer number (1438874118).

Almost surely, 2^21423230034 is an apocalyptic number.

21423230034 is an abundant number, since it is smaller than the sum of its proper divisors (24620741742).

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

21423230034 is a wasteful number, since it uses less digits than its factorization.

21423230034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3134890.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21423230034 its reverse (43003232412), we get a palindrome (64426462446).

The spelling of 21423230034 in words is "twenty-one billion, four hundred twenty-three million, two hundred thirty thousand, thirty-four".