11821995192 has 48 divisors (see below), whose sum is σ = 34380295560. Its totient is φ = 3377712576.

The previous prime is 11821995179. The next prime is 11821995197. The reversal of 11821995192 is 29159912811.

It is a super-2 number, since 2×11821995192² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821995197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5025183 + ... + 5027534.

Almost surely, 2^11821995192 is an apocalyptic number.

11821995192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11821995192 is an abundant number, since it is smaller than the sum of its proper divisors (22558300368).

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

11821995192 is a wasteful number, since it uses less digits than its factorization.

11821995192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052740 (or 10052729 counting only the distinct ones).

The product of its digits is 116640, while the sum is 48.

The spelling of 11821995192 in words is "eleven billion, eight hundred twenty-one million, nine hundred ninety-five thousand, one hundred ninety-two".