20874583 has 4 divisors (see below), whose sum is σ = 21126168. Its totient is φ = 20623000.

The previous prime is 20874571. The next prime is 20874611. The reversal of 20874583 is 38547802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20874583 is a prime.

It is a super-3 number, since 3×20874583³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874883) 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, 125668 + ... + 125833.

It is an arithmetic number, because the mean of its divisors is an integer number (5281542).

Almost surely, 2^20874583 is an apocalyptic number.

20874583 is a deficient number, since it is larger than the sum of its proper divisors (251585).

20874583 is an equidigital number, since it uses as much as digits as its factorization.

20874583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251584.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20874583 is about 4568.8710859467. The cubic root of 20874583 is about 275.3420888794.

It can be divided in two parts, 2087 and 4583, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20874583 in words is "twenty million, eight hundred seventy-four thousand, five hundred eighty-three".