11720261061820 has 24 divisors (see below), whose sum is σ = 25184933074224. Its totient is φ = 4579078740096.

The previous prime is 11720261061791. The next prime is 11720261061889. The reversal of 11720261061820 is 2816016202711.

It is a self number, because there is not a number n which added to its sum of digits gives 11720261061820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6814104409 + ... + 6814106128.

It is an arithmetic number, because the mean of its divisors is an integer number (1049372211426).

Almost surely, 2^{11720261061820} is an apocalyptic number.

11720261061820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11720261061820 is an abundant number, since it is smaller than the sum of its proper divisors (13464672012404).

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

11720261061820 is a wasteful number, since it uses less digits than its factorization.

11720261061820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13628210589 (or 13628210587 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 11720261061820 in words is "eleven trillion, seven hundred twenty billion, two hundred sixty-one million, sixty-one thousand, eight hundred twenty".