11940266520 has 384 divisors, whose sum is σ = 50277427200. Its totient is φ = 2386547712.

The previous prime is 11940266473. The next prime is 11940266543. The reversal of 11940266520 is 2566204911.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 612849 + ... + 632031.

It is an arithmetic number, because the mean of its divisors is an integer number (130930800).

Almost surely, 2^11940266520 is an apocalyptic number.

11940266520 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 11940266520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25138713600).

11940266520 is an abundant number, since it is smaller than the sum of its proper divisors (38337160680).

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

11940266520 is a wasteful number, since it uses less digits than its factorization.

11940266520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239 (or 19232 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 11940266520 in words is "eleven billion, nine hundred forty million, two hundred sixty-six thousand, five hundred twenty".