18953619828 has 96 divisors (see below), whose sum is σ = 52072621440. Its totient is φ = 5289891840.

The previous prime is 18953619799. The next prime is 18953619847. The reversal of 18953619828 is 82891635981.

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 31 ways as a sum of consecutive naturals, for example, 772128 + ... + 796296.

It is an arithmetic number, because the mean of its divisors is an integer number (542423140).

Almost surely, 2^18953619828 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 18953619828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26036310720).

18953619828 is an abundant number, since it is smaller than the sum of its proper divisors (33119001612).

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

18953619828 is a wasteful number, since it uses less digits than its factorization.

18953619828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24657 (or 24655 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 60.

The spelling of 18953619828 in words is "eighteen billion, nine hundred fifty-three million, six hundred nineteen thousand, eight hundred twenty-eight".