187038890920 has 128 divisors (see below), whose sum is σ = 494406581760. Its totient is φ = 62337530880.

The previous prime is 187038890891. The next prime is 187038890921. The reversal of 187038890920 is 29098830781.

It is not an unprimeable number, because it can be changed into a prime (187038890921) 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, 12227517 + ... + 12242803.

It is an arithmetic number, because the mean of its divisors is an integer number (3862551420).

Almost surely, 2^187038890920 is an apocalyptic number.

187038890920 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 187038890920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247203290880).

187038890920 is an abundant number, since it is smaller than the sum of its proper divisors (307367690840).

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

187038890920 is a wasteful number, since it uses less digits than its factorization.

187038890920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16523 (or 16519 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 187038890920 in words is "one hundred eighty-seven billion, thirty-eight million, eight hundred ninety thousand, nine hundred twenty".