21232170346 has 8 divisors (see below), whose sum is σ = 32388056640. Its totient is φ = 10436151468.

The previous prime is 21232170299. The next prime is 21232170359. The reversal of 21232170346 is 64307123212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 89966706 + ... + 89966941.

It is an arithmetic number, because the mean of its divisors is an integer number (4048507080).

Almost surely, 2^21232170346 is an apocalyptic number.

21232170346 is a deficient number, since it is larger than the sum of its proper divisors (11155886294).

21232170346 is a wasteful number, since it uses less digits than its factorization.

21232170346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179933708.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 21232170346 its reverse (64307123212), we get a palindrome (85539293558).

The spelling of 21232170346 in words is "twenty-one billion, two hundred thirty-two million, one hundred seventy thousand, three hundred forty-six".