11724721340 has 12 divisors (see below), whose sum is σ = 24621914856. Its totient is φ = 4689888528.

The previous prime is 11724721331. The next prime is 11724721403. The reversal of 11724721340 is 4312742711.

It is a junction number, because it is equal to n+sod(n) for n = 11724721297 and 11724721306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293118014 + ... + 293118053.

It is an arithmetic number, because the mean of its divisors is an integer number (2051826238).

Almost surely, 2^11724721340 is an apocalyptic number.

11724721340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11724721340 is an abundant number, since it is smaller than the sum of its proper divisors (12897193516).

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

11724721340 is a wasteful number, since it uses less digits than its factorization.

11724721340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586236076 (or 586236074 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 11724721340 in words is "eleven billion, seven hundred twenty-four million, seven hundred twenty-one thousand, three hundred forty".