18956548520 has 256 divisors, whose sum is σ = 56096409600. Its totient is φ = 5597475840.

The previous prime is 18956548483. The next prime is 18956548529. The reversal of 18956548520 is 2584565981.

It is a super-2 number, since 2×18956548520² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18956548529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4631675 + ... + 4635765.

It is an arithmetic number, because the mean of its divisors is an integer number (219126600).

Almost surely, 2^18956548520 is an apocalyptic number.

18956548520 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 18956548520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28048204800).

18956548520 is an abundant number, since it is smaller than the sum of its proper divisors (37139861080).

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

18956548520 is a wasteful number, since it uses less digits than its factorization.

18956548520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 18956548520 in words is "eighteen billion, nine hundred fifty-six million, five hundred forty-eight thousand, five hundred twenty".