20872583 has 8 divisors (see below), whose sum is σ = 23263920. Its totient is φ = 18610560.

The previous prime is 20872571. The next prime is 20872589. The reversal of 20872583 is 38527802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20872583 - 2¹⁸ = 20610439 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 (20872589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31988 + ... + 32633.

It is an arithmetic number, because the mean of its divisors is an integer number (2907990).

Almost surely, 2^20872583 is an apocalyptic number.

20872583 is a deficient number, since it is larger than the sum of its proper divisors (2391337).

20872583 is a wasteful number, since it uses less digits than its factorization.

20872583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64657.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 20872583 is about 4568.6522082557. The cubic root of 20872583 is about 275.3332950627. Note that the first 3 decimals are identical.

The spelling of 20872583 in words is "twenty million, eight hundred seventy-two thousand, five hundred eighty-three".