21343003234 has 16 divisors (see below), whose sum is σ = 36591320448. Its totient is φ = 9146172672.

The previous prime is 21343003223. The next prime is 21343003267. The reversal of 21343003234 is 43230034312.

It is a junction number, because it is equal to n+sod(n) for n = 21343003199 and 21343003208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106347 + ... + 232369.

It is an arithmetic number, because the mean of its divisors is an integer number (2286957528).

Almost surely, 2^21343003234 is an apocalyptic number.

21343003234 is a deficient number, since it is larger than the sum of its proper divisors (15248317214).

21343003234 is a wasteful number, since it uses less digits than its factorization.

21343003234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138129.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21343003234 its reverse (43230034312), we get a palindrome (64573037546).

The spelling of 21343003234 in words is "twenty-one billion, three hundred forty-three million, three thousand, two hundred thirty-four".