20860587 has 12 divisors (see below), whose sum is σ = 32871384. Its totient is φ = 12642720.

The previous prime is 20860561. The next prime is 20860601. The reversal of 20860587 is 78506802.

It is not a de Polignac number, because 20860587 - 2⁶ = 20860523 is a prime.

It is a super-3 number, since 3×20860587³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20860507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105258 + ... + 105455.

It is an arithmetic number, because the mean of its divisors is an integer number (2739282).

Almost surely, 2^20860587 is an apocalyptic number.

20860587 is a deficient number, since it is larger than the sum of its proper divisors (12010797).

20860587 is a wasteful number, since it uses less digits than its factorization.

20860587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210730 (or 210727 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 20860587 is about 4567.3391597297. The cubic root of 20860587 is about 275.2805379577.

The spelling of 20860587 in words is "twenty million, eight hundred sixty thousand, five hundred eighty-seven".