21323163570 has 16 divisors (see below), whose sum is σ = 51175592640. Its totient is φ = 5686176944.

The previous prime is 21323163569. The next prime is 21323163623. The reversal of 21323163570 is 7536132312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355386030 + ... + 355386089.

It is an arithmetic number, because the mean of its divisors is an integer number (3198474540).

Almost surely, 2^21323163570 is an apocalyptic number.

21323163570 is an abundant number, since it is smaller than the sum of its proper divisors (29852429070).

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

21323163570 is a wasteful number, since it uses less digits than its factorization.

21323163570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710772129.

The product of its (nonzero) digits is 22680, while the sum is 33.

Adding to 21323163570 its reverse (7536132312), we get a palindrome (28859295882).

The spelling of 21323163570 in words is "twenty-one billion, three hundred twenty-three million, one hundred sixty-three thousand, five hundred seventy".