11311003020 has 48 divisors (see below), whose sum is σ = 33047804160. Its totient is φ = 2885125056.

The previous prime is 11311003013. The next prime is 11311003027. The reversal of 11311003020 is 2030011311.

It is an interprime number because it is at equal distance from previous prime (11311003013) and next prime (11311003027).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11311002987 and 11311003005.

It is not an unprimeable number, because it can be changed into a prime (11311003027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4096810 + ... + 4099569.

It is an arithmetic number, because the mean of its divisors is an integer number (688495920).

Almost surely, 2^11311003020 is an apocalyptic number.

11311003020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311003020 is an abundant number, since it is smaller than the sum of its proper divisors (21736801140).

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

11311003020 is a wasteful number, since it uses less digits than its factorization.

11311003020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8196414 (or 8196412 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 11311003020 its reverse (2030011311), we get a palindrome (13341014331).

The spelling of 11311003020 in words is "eleven billion, three hundred eleven million, three thousand, twenty".