11720835720 has 192 divisors, whose sum is σ = 41713963200. Its totient is φ = 2830594560.

The previous prime is 11720835697. The next prime is 11720835733. The reversal of 11720835720 is 2753802711.

11720835720 is a `hidden beast` number, since 1 + 1 + 7 + 2 + 0 + 83 + 572 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1059739 + ... + 1070741.

It is an arithmetic number, because the mean of its divisors is an integer number (217260225).

Almost surely, 2^11720835720 is an apocalyptic number.

11720835720 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 11720835720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20856981600).

11720835720 is an abundant number, since it is smaller than the sum of its proper divisors (29993127480).

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

11720835720 is a wasteful number, since it uses less digits than its factorization.

11720835720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11300 (or 11293 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The spelling of 11720835720 in words is "eleven billion, seven hundred twenty million, eight hundred thirty-five thousand, seven hundred twenty".