20131793 has 4 divisors (see below), whose sum is σ = 21961968. Its totient is φ = 18301620.

The previous prime is 20131763. The next prime is 20131801. The reversal of 20131793 is 39713102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20131793 - 2¹⁰ = 20130769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915071 + ... + 915092.

It is an arithmetic number, because the mean of its divisors is an integer number (5490492).

Almost surely, 2^20131793 is an apocalyptic number.

It is an amenable number.

20131793 is a deficient number, since it is larger than the sum of its proper divisors (1830175).

20131793 is a wasteful number, since it uses less digits than its factorization.

20131793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830174.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 20131793 is about 4486.8466655325. The cubic root of 20131793 is about 272.0366921738.

Adding to 20131793 its reverse (39713102), we get a palindrome (59844895).

The spelling of 20131793 in words is "twenty million, one hundred thirty-one thousand, seven hundred ninety-three".