21134233510 has 32 divisors (see below), whose sum is σ = 41967126432. Its totient is φ = 7613080320.

The previous prime is 21134233453. The next prime is 21134233511. The reversal of 21134233510 is 1533243112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134233511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1977244 + ... + 1987903.

It is an arithmetic number, because the mean of its divisors is an integer number (1311472701).

Almost surely, 2^21134233510 is an apocalyptic number.

21134233510 is a deficient number, since it is larger than the sum of its proper divisors (20832892922).

21134233510 is a wasteful number, since it uses less digits than its factorization.

21134233510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965208.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21134233510 its reverse (1533243112), we get a palindrome (22667476622).

The spelling of 21134233510 in words is "twenty-one billion, one hundred thirty-four million, two hundred thirty-three thousand, five hundred ten".