20400421440113 has 32 divisors (see below), whose sum is σ = 24051246710400. Its totient is φ = 17059019927040.

The previous prime is 20400421440109. The next prime is 20400421440247. The reversal of 20400421440113 is 31104412400402.

It is not a de Polignac number, because 20400421440113 - 2² = 20400421440109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20400421442113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 532642838 + ... + 532681136.

It is an arithmetic number, because the mean of its divisors is an integer number (751601459700).

Almost surely, 2^{20400421440113} is an apocalyptic number.

It is an amenable number.

20400421440113 is a deficient number, since it is larger than the sum of its proper divisors (3650825270287).

20400421440113 is a wasteful number, since it uses less digits than its factorization.

20400421440113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51329.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20400421440113 its reverse (31104412400402), we get a palindrome (51504833840515).

The spelling of 20400421440113 in words is "twenty trillion, four hundred billion, four hundred twenty-one million, four hundred forty thousand, one hundred thirteen".