20850317531135 has 8 divisors (see below), whose sum is σ = 25028072535840. Its totient is φ = 16675126359264.

The previous prime is 20850317531119. The next prime is 20850317531149. The reversal of 20850317531135 is 53113571305802.

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 20850317531135 - 2⁴ = 20850317531119 is a prime.

It is a super-2 number, since 2×20850317531135² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640940315 + ... + 640972844.

It is an arithmetic number, because the mean of its divisors is an integer number (3128509066980).

Almost surely, 2^{20850317531135} is an apocalyptic number.

20850317531135 is a deficient number, since it is larger than the sum of its proper divisors (4177755004705).

20850317531135 is a wasteful number, since it uses less digits than its factorization.

20850317531135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281916417.

The product of its (nonzero) digits is 378000, while the sum is 44.

Adding to 20850317531135 its reverse (53113571305802), we get a palindrome (73963888836937).

The spelling of 20850317531135 in words is "twenty trillion, eight hundred fifty billion, three hundred seventeen million, five hundred thirty-one thousand, one hundred thirty-five".