21232122734 has 4 divisors (see below), whose sum is σ = 31848184104. Its totient is φ = 10616061366.

The previous prime is 21232122689. The next prime is 21232122757. The reversal of 21232122734 is 43722123212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21232122697 and 21232122706.

It is a congruent 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 as a sum of consecutive naturals, namely, 5308030682 + ... + 5308030685.

It is an arithmetic number, because the mean of its divisors is an integer number (7962046026).

Almost surely, 2^21232122734 is an apocalyptic number.

21232122734 is a deficient number, since it is larger than the sum of its proper divisors (10616061370).

21232122734 is a wasteful number, since it uses less digits than its factorization.

21232122734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616061369.

The product of its digits is 8064, while the sum is 29.

Adding to 21232122734 its reverse (43722123212), we get a palindrome (64954245946).

The spelling of 21232122734 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-two thousand, seven hundred thirty-four".