21134312034 has 32 divisors (see below), whose sum is σ = 46117451520. Its totient is φ = 6403472400.

The previous prime is 21134311997. The next prime is 21134312041. The reversal of 21134312034 is 43021343112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21134311995 and 21134312013.

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, 609537 + ... + 643275.

It is an arithmetic number, because the mean of its divisors is an integer number (1441170360).

Almost surely, 2^21134312034 is an apocalyptic number.

21134312034 is an abundant number, since it is smaller than the sum of its proper divisors (24983139486).

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

21134312034 is a wasteful number, since it uses less digits than its factorization.

21134312034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43246.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21134312034 its reverse (43021343112), we get a palindrome (64155655146).

The spelling of 21134312034 in words is "twenty-one billion, one hundred thirty-four million, three hundred twelve thousand, thirty-four".