113257040020 has 24 divisors (see below), whose sum is σ = 238013068104. Its totient is φ = 45269809536.

The previous prime is 113257040009. The next prime is 113257040077. The reversal of 113257040020 is 20040752311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48372723844 + 64884316176 = 219938^2 + 254724^2 .

It is a super-2 number, since 2×113257040020² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034759 + ... + 2089678.

It is an arithmetic number, because the mean of its divisors is an integer number (9917211171).

Almost surely, 2^113257040020 is an apocalyptic number.

113257040020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113257040020 is an abundant number, since it is smaller than the sum of its proper divisors (124756028084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

113257040020 is a wasteful number, since it uses less digits than its factorization.

113257040020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125819 (or 4125817 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 113257040020 its reverse (20040752311), we get a palindrome (133297792331).

The spelling of 113257040020 in words is "one hundred thirteen billion, two hundred fifty-seven million, forty thousand, twenty".