18879572550 has 96 divisors (see below), whose sum is σ = 47799797760. Its totient is φ = 4929724800.

The previous prime is 18879572501. The next prime is 18879572573. The reversal of 18879572550 is 5527597881.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4537371 + ... + 4541529.

It is an arithmetic number, because the mean of its divisors is an integer number (497914560).

Almost surely, 2^18879572550 is an apocalyptic number.

18879572550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18879572550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23899898880).

18879572550 is an abundant number, since it is smaller than the sum of its proper divisors (28920225210).

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

18879572550 is a wasteful number, since it uses less digits than its factorization.

18879572550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798 (or 4793 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 57.

The spelling of 18879572550 in words is "eighteen billion, eight hundred seventy-nine million, five hundred seventy-two thousand, five hundred fifty".