2113420405 has 4 divisors (see below), whose sum is σ = 2536104492. Its totient is φ = 1690736320.

The previous prime is 2113420391. The next prime is 2113420409. The reversal of 2113420405 is 5040243112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1117765489 + 995654916 = 33433^2 + 31554^2 .

It is not a de Polignac number, because 2113420405 - 2⁷ = 2113420277 is a prime.

It is a super-4 number, since 4×2113420405⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113420409) 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, 211342036 + ... + 211342045.

It is an arithmetic number, because the mean of its divisors is an integer number (634026123).

Almost surely, 2^2113420405 is an apocalyptic number.

It is an amenable number.

2113420405 is a deficient number, since it is larger than the sum of its proper divisors (422684087).

2113420405 is an equidigital number, since it uses as much as digits as its factorization.

2113420405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422684086.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2113420405 is about 45971.9523731590. The cubic root of 2113420405 is about 1283.3012936661.

Adding to 2113420405 its reverse (5040243112), we get a palindrome (7153663517).

The spelling of 2113420405 in words is "two billion, one hundred thirteen million, four hundred twenty thousand, four hundred five".