21985327 has 8 divisors (see below), whose sum is σ = 27058976. Its totient is φ = 17394912.

The previous prime is 21985319. The next prime is 21985357. The reversal of 21985327 is 72358912.

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 21985327 - 2³ = 21985319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21985357) 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, 120708 + ... + 120889.

It is an arithmetic number, because the mean of its divisors is an integer number (3382372).

Almost surely, 2^21985327 is an apocalyptic number.

21985327 is a deficient number, since it is larger than the sum of its proper divisors (5073649).

21985327 is a wasteful number, since it uses less digits than its factorization.

21985327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241617.

The product of its digits is 30240, while the sum is 37.

The square root of 21985327 is about 4688.8513518771. The cubic root of 21985327 is about 280.1416247823.

The spelling of 21985327 in words is "twenty-one million, nine hundred eighty-five thousand, three hundred twenty-seven".