21936573346 has 8 divisors (see below), whose sum is σ = 33095062044. Its totient is φ = 10904886000.

The previous prime is 21936573317. The next prime is 21936573353. The reversal of 21936573346 is 64337563912.

It can be written as a sum of positive squares in 2 ways, for example, as 21408079225 + 528494121 = 146315^2 + 22989^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21936573346.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31699905 + ... + 31700596.

Almost surely, 2^21936573346 is an apocalyptic number.

21936573346 is a deficient number, since it is larger than the sum of its proper divisors (11158488698).

21936573346 is a wasteful number, since it uses less digits than its factorization.

21936573346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63400676.

The product of its digits is 2449440, while the sum is 49.

The spelling of 21936573346 in words is "twenty-one billion, nine hundred thirty-six million, five hundred seventy-three thousand, three hundred forty-six".