20020400113 has 4 divisors (see below), whose sum is σ = 22880457280. Its totient is φ = 17160342948.

The previous prime is 20020400107. The next prime is 20020400171. The reversal of 20020400113 is 31100402002.

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 not a de Polignac number, because 20020400113 - 2⁹ = 20020399601 is a prime.

It is a super-2 number, since 2×20020400113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020400093 and 20020400102.

It is not an unprimeable number, because it can be changed into a prime (20020400513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430028573 + ... + 1430028586.

It is an arithmetic number, because the mean of its divisors is an integer number (5720114320).

Almost surely, 2^20020400113 is an apocalyptic number.

It is an amenable number.

20020400113 is a deficient number, since it is larger than the sum of its proper divisors (2860057167).

20020400113 is an equidigital number, since it uses as much as digits as its factorization.

20020400113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860057166.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20020400113 its reverse (31100402002), we get a palindrome (51120802115).

The spelling of 20020400113 in words is "twenty billion, twenty million, four hundred thousand, one hundred thirteen".