21230004034 has 4 divisors (see below), whose sum is σ = 31845006054. Its totient is φ = 10615002016.

The previous prime is 21230004013. The next prime is 21230004049. The reversal of 21230004034 is 43040003212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15812308009 + 5417696025 = 125747^2 + 73605^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307501007 + ... + 5307501010.

Almost surely, 2^21230004034 is an apocalyptic number.

21230004034 is a deficient number, since it is larger than the sum of its proper divisors (10615002020).

21230004034 is a wasteful number, since it uses less digits than its factorization.

21230004034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615002019.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21230004034 its reverse (43040003212), we get a palindrome (64270007246).

The spelling of 21230004034 in words is "twenty-one billion, two hundred thirty million, four thousand, thirty-four".