21004301234 has 16 divisors (see below), whose sum is σ = 36081322368. Its totient is φ = 8983356192.

The previous prime is 21004301233. The next prime is 21004301251. The reversal of 21004301234 is 43210340012.

It is a super-2 number, since 2×21004301234² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21004301231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1533539 + ... + 1547174.

It is an arithmetic number, because the mean of its divisors is an integer number (2255082648).

Almost surely, 2^21004301234 is an apocalyptic number.

21004301234 is a deficient number, since it is larger than the sum of its proper divisors (15077021134).

21004301234 is a wasteful number, since it uses less digits than its factorization.

21004301234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081209.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21004301234 its reverse (43210340012), we get a palindrome (64214641246).

The spelling of 21004301234 in words is "twenty-one billion, four million, three hundred one thousand, two hundred thirty-four".