11690911820 has 96 divisors (see below), whose sum is σ = 28306188288. Its totient is φ = 3973036032.

The previous prime is 11690911789. The next prime is 11690911823. The reversal of 11690911820 is 2811909611.

It is not an unprimeable number, because it can be changed into a prime (11690911823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15734369 + ... + 15735111.

It is an arithmetic number, because the mean of its divisors is an integer number (294856128).

Almost surely, 2^11690911820 is an apocalyptic number.

11690911820 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 11690911820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14153094144).

11690911820 is an abundant number, since it is smaller than the sum of its proper divisors (16615276468).

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

11690911820 is a wasteful number, since it uses less digits than its factorization.

11690911820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 38.

The spelling of 11690911820 in words is "eleven billion, six hundred ninety million, nine hundred eleven thousand, eight hundred twenty".