20966359 has 4 divisors (see below), whose sum is σ = 21152016. Its totient is φ = 20780704.

The previous prime is 20966357. The next prime is 20966369. The reversal of 20966359 is 95366902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20966359 - 2¹ = 20966357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20966357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92659 + ... + 92884.

It is an arithmetic number, because the mean of its divisors is an integer number (5288004).

Almost surely, 2^20966359 is an apocalyptic number.

20966359 is a deficient number, since it is larger than the sum of its proper divisors (185657).

20966359 is a wasteful number, since it uses less digits than its factorization.

20966359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185656.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 20966359 is about 4578.9036897493. The cubic root of 20966359 is about 275.7450167285.

The spelling of 20966359 in words is "twenty million, nine hundred sixty-six thousand, three hundred fifty-nine".