21434021106 has 32 divisors (see below), whose sum is σ = 45401130240. Its totient is φ = 6727107024.

The previous prime is 21434021051. The next prime is 21434021111. The reversal of 21434021106 is 60112043412.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 558160 + ... + 595323.

It is an arithmetic number, because the mean of its divisors is an integer number (1418785320).

Almost surely, 2^21434021106 is an apocalyptic number.

21434021106 is an abundant number, since it is smaller than the sum of its proper divisors (23967109134).

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

21434021106 is a wasteful number, since it uses less digits than its factorization.

21434021106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153670.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21434021106 its reverse (60112043412), we get a palindrome (81546064518).

The spelling of 21434021106 in words is "twenty-one billion, four hundred thirty-four million, twenty-one thousand, one hundred six".