20337893 has 4 divisors (see below), whose sum is σ = 20547660. Its totient is φ = 20128128.

The previous prime is 20337883. The next prime is 20337929. The reversal of 20337893 is 39873302.

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 3214849 + 17123044 = 1793^2 + 4138^2 .

It is a cyclic number.

It is not a de Polignac number, because 20337893 - 2¹⁸ = 20075749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20337883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104738 + ... + 104931.

It is an arithmetic number, because the mean of its divisors is an integer number (5136915).

Almost surely, 2^20337893 is an apocalyptic number.

It is an amenable number.

20337893 is a deficient number, since it is larger than the sum of its proper divisors (209767).

20337893 is an equidigital number, since it uses as much as digits as its factorization.

20337893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209766.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20337893 is about 4509.7553148702. The cubic root of 20337893 is about 272.9618708125.

The spelling of 20337893 in words is "twenty million, three hundred thirty-seven thousand, eight hundred ninety-three".