20883385 has 4 divisors (see below), whose sum is σ = 25060068. Its totient is φ = 16706704.

The previous prime is 20883383. The next prime is 20883403. The reversal of 20883385 is 58338802.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3644281 + 17239104 = 1909^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 20883385 - 2¹ = 20883383 is a prime.

It is a super-2 number, since 2×20883385² = 872231538116450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20883383) 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, 2088334 + ... + 2088343.

It is an arithmetic number, because the mean of its divisors is an integer number (6265017).

Almost surely, 2^20883385 is an apocalyptic number.

It is an amenable number.

20883385 is a deficient number, since it is larger than the sum of its proper divisors (4176683).

20883385 is an equidigital number, since it uses as much as digits as its factorization.

20883385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176682.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 20883385 is about 4569.8342420705. The cubic root of 20883385 is about 275.3807837921.

The spelling of 20883385 in words is "twenty million, eight hundred eighty-three thousand, three hundred eighty-five".