11321000020 has 48 divisors (see below), whose sum is σ = 25981091136. Its totient is φ = 4109472000.

The previous prime is 11321000017. The next prime is 11321000057. The reversal of 11321000020 is 2000012311.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11320999970 and 11321000006.

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, 80560 + ... + 170680.

It is an arithmetic number, because the mean of its divisors is an integer number (541272732).

Almost surely, 2^11321000020 is an apocalyptic number.

11321000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11321000020 is an abundant number, since it is smaller than the sum of its proper divisors (14660091116).

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

11321000020 is a wasteful number, since it uses less digits than its factorization.

11321000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90712 (or 90710 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 11321000020 its reverse (2000012311), we get a palindrome (13321012331).

The spelling of 11321000020 in words is "eleven billion, three hundred twenty-one million, twenty", and thus it is an aban number.