11233512531820 has 96 divisors (see below), whose sum is σ = 24674162042880. Its totient is φ = 4287901432320.

The previous prime is 11233512531743. The next prime is 11233512531887. The reversal of 11233512531820 is 2813521533211.

It is a self number, because there is not a number n which added to its sum of digits gives 11233512531820.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466670385 + ... + 466694455.

It is an arithmetic number, because the mean of its divisors is an integer number (257022521280).

Almost surely, 2^{11233512531820} is an apocalyptic number.

11233512531820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11233512531820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12337081021440).

11233512531820 is an abundant number, since it is smaller than the sum of its proper divisors (13440649511060).

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

11233512531820 is a wasteful number, since it uses less digits than its factorization.

11233512531820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26455 (or 26453 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 11233512531820 in words is "eleven trillion, two hundred thirty-three billion, five hundred twelve million, five hundred thirty-one thousand, eight hundred twenty".