21337320827 has 8 divisors (see below), whose sum is σ = 21830886720. Its totient is φ = 20847124480.

The previous prime is 21337320817. The next prime is 21337320847. The reversal of 21337320827 is 72802373312.

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

It is a cyclic number.

It is not a de Polignac number, because 21337320827 - 2⁴ = 21337320811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21337320817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829574 + ... + 854907.

It is an arithmetic number, because the mean of its divisors is an integer number (2728860840).

Almost surely, 2^21337320827 is an apocalyptic number.

21337320827 is a deficient number, since it is larger than the sum of its proper divisors (493565893).

21337320827 is a wasteful number, since it uses less digits than its factorization.

21337320827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684773.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 21337320827 in words is "twenty-one billion, three hundred thirty-seven million, three hundred twenty thousand, eight hundred twenty-seven".