11887221892 has 48 divisors (see below), whose sum is σ = 25648534912. Its totient is φ = 4694319360.

The previous prime is 11887221869. The next prime is 11887221917. The reversal of 11887221892 is 29812278811.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179248 + ... + 236440.

Almost surely, 2^11887221892 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11887221892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12824267456).

11887221892 is an abundant number, since it is smaller than the sum of its proper divisors (13761313020).

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

11887221892 is a wasteful number, since it uses less digits than its factorization.

11887221892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57788 (or 57786 counting only the distinct ones).

The product of its digits is 258048, while the sum is 49.

The spelling of 11887221892 in words is "eleven billion, eight hundred eighty-seven million, two hundred twenty-one thousand, eight hundred ninety-two".