21003340234 has 32 divisors (see below), whose sum is σ = 33503673600. Its totient is φ = 9840933120.

The previous prime is 21003340229. The next prime is 21003340289. The reversal of 21003340234 is 43204330012.

It is a happy number.

It is a super-2 number, since 2×21003340234² (a number of 21 digits) contains 22 as substring.

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, 12583552 + ... + 12585220.

It is an arithmetic number, because the mean of its divisors is an integer number (1046989800).

Almost surely, 2^21003340234 is an apocalyptic number.

21003340234 is a deficient number, since it is larger than the sum of its proper divisors (12500333366).

21003340234 is a wasteful number, since it uses less digits than its factorization.

21003340234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21003340234 its reverse (43204330012), we get a palindrome (64207670246).

The spelling of 21003340234 in words is "twenty-one billion, three million, three hundred forty thousand, two hundred thirty-four".