13043240020 has 48 divisors (see below), whose sum is σ = 27584902800. Its totient is φ = 5180451840.

The previous prime is 13043239999. The next prime is 13043240053. The reversal of 13043240020 is 2004234031.

It can be written as a sum of positive squares in 8 ways, for example, as 1403851024 + 11639388996 = 37468^2 + 107886^2 .

It is a super-2 number, since 2×13043240020² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13043240020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1777960 + ... + 1785280.

It is an arithmetic number, because the mean of its divisors is an integer number (574685475).

Almost surely, 2^13043240020 is an apocalyptic number.

13043240020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13043240020 is an abundant number, since it is smaller than the sum of its proper divisors (14541662780).

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

13043240020 is a wasteful number, since it uses less digits than its factorization.

13043240020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7948 (or 7946 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 13043240020 its reverse (2004234031), we get a palindrome (15047474051).

The spelling of 13043240020 in words is "thirteen billion, forty-three million, two hundred forty thousand, twenty".