20313220113 has 24 divisors (see below), whose sum is σ = 30869330856. Its totient is φ = 12854764800.

The previous prime is 20313220099. The next prime is 20313220121. The reversal of 20313220113 is 31102231302.

20313220113 is a `hidden beast` number, since 20 + 313 + 220 + 113 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4585050369 + 15728169744 = 67713^2 + 125412^2 .

It is not a de Polignac number, because 20313220113 - 2⁹ = 20313219601 is a prime.

It is a super-2 number, since 2×20313220113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20313220513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 730258 + ... + 757563.

It is an arithmetic number, because the mean of its divisors is an integer number (1286222119).

Almost surely, 2^20313220113 is an apocalyptic number.

It is an amenable number.

20313220113 is a deficient number, since it is larger than the sum of its proper divisors (10556110743).

20313220113 is a wasteful number, since it uses less digits than its factorization.

20313220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487905 (or 1487902 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20313220113 its reverse (31102231302), we get a palindrome (51415451415).

The spelling of 20313220113 in words is "twenty billion, three hundred thirteen million, two hundred twenty thousand, one hundred thirteen".