21233005434 has 24 divisors (see below), whose sum is σ = 46015493472. Its totient is φ = 7076030280.

The previous prime is 21233005399. The next prime is 21233005489. The reversal of 21233005434 is 43450033212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21233005398 and 21233005407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55284 + ... + 213359.

It is an arithmetic number, because the mean of its divisors is an integer number (1917312228).

Almost surely, 2^21233005434 is an apocalyptic number.

21233005434 is an abundant number, since it is smaller than the sum of its proper divisors (24782488038).

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

21233005434 is a wasteful number, since it uses less digits than its factorization.

21233005434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273042 (or 273039 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21233005434 its reverse (43450033212), we get a palindrome (64683038646).

The spelling of 21233005434 in words is "twenty-one billion, two hundred thirty-three million, five thousand, four hundred thirty-four".