20287380585 has 32 divisors (see below), whose sum is σ = 32624946432. Its totient is φ = 10765025280.

The previous prime is 20287380577. The next prime is 20287380643. The reversal of 20287380585 is 58508378202.

It is not a de Polignac number, because 20287380585 - 2³ = 20287380577 is a prime.

It is a super-3 number, since 3×20287380585³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2687937 + ... + 2695473.

It is an arithmetic number, because the mean of its divisors is an integer number (1019529576).

Almost surely, 2^20287380585 is an apocalyptic number.

It is an amenable number.

20287380585 is a deficient number, since it is larger than the sum of its proper divisors (12337565847).

20287380585 is a wasteful number, since it uses less digits than its factorization.

20287380585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8433.

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 20287380585 in words is "twenty billion, two hundred eighty-seven million, three hundred eighty thousand, five hundred eighty-five".