20376571081587 has 8 divisors (see below), whose sum is σ = 31050013076736. Its totient is φ = 11643754903752.

The previous prime is 20376571081561. The next prime is 20376571081613. The reversal of 20376571081587 is 78518017567302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20376571081561) and next prime (20376571081613).

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

It is not a de Polignac number, because 20376571081587 - 2¹¹ = 20376571079539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20376571081587.

It is not an unprimeable number, because it can be changed into a prime (20376571085587) 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, 485156454303 + ... + 485156454344.

It is an arithmetic number, because the mean of its divisors is an integer number (3881251634592).

Almost surely, 2^{20376571081587} is an apocalyptic number.

20376571081587 is a deficient number, since it is larger than the sum of its proper divisors (10673441995149).

20376571081587 is an equidigital number, since it uses as much as digits as its factorization.

20376571081587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970312908657.

The product of its (nonzero) digits is 19756800, while the sum is 60.

The spelling of 20376571081587 in words is "twenty trillion, three hundred seventy-six billion, five hundred seventy-one million, eighty-one thousand, five hundred eighty-seven".