21204304233134 has 16 divisors (see below), whose sum is σ = 34749204920496. Its totient is φ = 9624083289600.

The previous prime is 21204304233131. The next prime is 21204304233173. The reversal of 21204304233134 is 43133240340212.

It is a super-2 number, since 2×21204304233134² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21204304233134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204304233131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711825587 + ... + 711855374.

It is an arithmetic number, because the mean of its divisors is an integer number (2171825307531).

Almost surely, 2^{21204304233134} is an apocalyptic number.

21204304233134 is a deficient number, since it is larger than the sum of its proper divisors (13544900687362).

21204304233134 is a wasteful number, since it uses less digits than its factorization.

21204304233134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423681651.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 21204304233134 its reverse (43133240340212), we get a palindrome (64337544573346).

The spelling of 21204304233134 in words is "twenty-one trillion, two hundred four billion, three hundred four million, two hundred thirty-three thousand, one hundred thirty-four".