20642232313 has 4 divisors (see below), whose sum is σ = 20835150480. Its totient is φ = 20449314148.

The previous prime is 20642232307. The next prime is 20642232341. The reversal of 20642232313 is 31323224602.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31323224602 = 2 ⋅15661612301.

It is a cyclic number.

It is not a de Polignac number, because 20642232313 - 2⁹ = 20642231801 is a prime.

It is a super-2 number, since 2×20642232313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20642232613) 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, 96458923 + ... + 96459136.

It is an arithmetic number, because the mean of its divisors is an integer number (5208787620).

Almost surely, 2^20642232313 is an apocalyptic number.

It is an amenable number.

20642232313 is a deficient number, since it is larger than the sum of its proper divisors (192918167).

20642232313 is a wasteful number, since it uses less digits than its factorization.

20642232313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192918166.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 20642232313 its reverse (31323224602), we get a palindrome (51965456915).

The spelling of 20642232313 in words is "twenty billion, six hundred forty-two million, two hundred thirty-two thousand, three hundred thirteen".