187947180980 has 96 divisors (see below), whose sum is σ = 436983306144. Its totient is φ = 67451387904.

The previous prime is 187947180979. The next prime is 187947181003. The reversal of 187947180980 is 89081749781.

It can be written as a sum of positive squares in 16 ways, for example, as 5578894864 + 182368286116 = 74692^2 + 427046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9928004 + ... + 9946916.

It is an arithmetic number, because the mean of its divisors is an integer number (4551909439).

Almost surely, 2^187947180980 is an apocalyptic number.

187947180980 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 187947180980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218491653072).

187947180980 is an abundant number, since it is smaller than the sum of its proper divisors (249036125164).

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

187947180980 is a wasteful number, since it uses less digits than its factorization.

187947180980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20005 (or 20003 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 62.

The spelling of 187947180980 in words is "one hundred eighty-seven billion, nine hundred forty-seven million, one hundred eighty thousand, nine hundred eighty".