2113420520 has 16 divisors (see below), whose sum is σ = 4755196260. Its totient is φ = 845368192.

The previous prime is 2113420469. The next prime is 2113420553. The reversal of 2113420520 is 250243112.

It can be written as a sum of positive squares in 2 ways, for example, as 1862958244 + 250462276 = 43162^2 + 15826^2 .

It is a super-3 number, since 3×2113420520³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2113420492 and 2113420501.

It is an unprimeable number.

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, 26417717 + ... + 26417796.

Almost surely, 2^2113420520 is an apocalyptic number.

2113420520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113420520 is an abundant number, since it is smaller than the sum of its proper divisors (2641775740).

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

2113420520 is a wasteful number, since it uses less digits than its factorization.

2113420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52835524 (or 52835520 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2113420520 is about 45971.9536239216. The cubic root of 2113420520 is about 1283.3013169427.

Adding to 2113420520 its reverse (250243112), we get a palindrome (2363663632).

The spelling of 2113420520 in words is "two billion, one hundred thirteen million, four hundred twenty thousand, five hundred twenty".