20173831023261 has 8 divisors (see below), whose sum is σ = 26898683899360. Its totient is φ = 13449099414672.

The previous prime is 20173831023233. The next prime is 20173831023263. The reversal of 20173831023261 is 16232013837102.

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

It is not a de Polignac number, because 20173831023261 - 2¹³ = 20173831015069 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 (20173831023263) 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, 29927995 + ... + 30594648.

It is an arithmetic number, because the mean of its divisors is an integer number (3362335487420).

Almost surely, 2^{20173831023261} is an apocalyptic number.

It is an amenable number.

20173831023261 is a deficient number, since it is larger than the sum of its proper divisors (6724852876099).

20173831023261 is a wasteful number, since it uses less digits than its factorization.

20173831023261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60633755.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 20173831023261 in words is "twenty trillion, one hundred seventy-three billion, eight hundred thirty-one million, twenty-three thousand, two hundred sixty-one".