11709325820 has 24 divisors (see below), whose sum is σ = 24632823600. Its totient is φ = 4675494272.

The previous prime is 11709325799. The next prime is 11709325883. The reversal of 11709325820 is 2852390711.

It is a super-2 number, since 2×11709325820² (a number of 21 digits) contains 22 as substring.

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, 503090 + ... + 525849.

It is an arithmetic number, because the mean of its divisors is an integer number (1026367650).

Almost surely, 2^11709325820 is an apocalyptic number.

11709325820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11709325820 is an abundant number, since it is smaller than the sum of its proper divisors (12923497780).

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

11709325820 is a wasteful number, since it uses less digits than its factorization.

11709325820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029517 (or 1029515 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 11709325820 in words is "eleven billion, seven hundred nine million, three hundred twenty-five thousand, eight hundred twenty".