11520002020 has 24 divisors (see below), whose sum is σ = 24325669368. Its totient is φ = 4582540800.

The previous prime is 11520001879. The next prime is 11520002029. The reversal of 11520002020 is 2020002511.

It can be written as a sum of positive squares in 4 ways, for example, as 29877156 + 11490124864 = 5466^2 + 107192^2 .

It is not an unprimeable number, because it can be changed into a prime (11520002029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587541 + ... + 1594780.

It is an arithmetic number, because the mean of its divisors is an integer number (1013569557).

Almost surely, 2^11520002020 is an apocalyptic number.

11520002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11520002020 is an abundant number, since it is smaller than the sum of its proper divisors (12805667348).

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

11520002020 is a wasteful number, since it uses less digits than its factorization.

11520002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182511 (or 3182509 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 11520002020 its reverse (2020002511), we get a palindrome (13540004531).

The spelling of 11520002020 in words is "eleven billion, five hundred twenty million, two thousand, twenty".