20697383 has 4 divisors (see below), whose sum is σ = 23654160. Its totient is φ = 17740608.

The previous prime is 20697379. The next prime is 20697389. The reversal of 20697383 is 38379602.

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 20697383 - 2² = 20697379 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 (20697389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478378 + ... + 1478391.

It is an arithmetic number, because the mean of its divisors is an integer number (5913540).

Almost surely, 2^20697383 is an apocalyptic number.

20697383 is a deficient number, since it is larger than the sum of its proper divisors (2956777).

20697383 is an equidigital number, since it uses as much as digits as its factorization.

20697383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956776.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20697383 is about 4549.4376575573. The cubic root of 20697383 is about 274.5607665931.

The spelling of 20697383 in words is "twenty million, six hundred ninety-seven thousand, three hundred eighty-three".