18726508780 has 96 divisors (see below), whose sum is σ = 47758419072. Its totient is φ = 6021120000.

The previous prime is 18726508769. The next prime is 18726508781. The reversal of 18726508780 is 8780562781.

It is a happy number.

It is a super-3 number, since 3×18726508780³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18726508781) 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 31 ways as a sum of consecutive naturals, for example, 654780 + ... + 682780.

It is an arithmetic number, because the mean of its divisors is an integer number (497483532).

Almost surely, 2^18726508780 is an apocalyptic number.

18726508780 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 18726508780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23879209536).

18726508780 is an abundant number, since it is smaller than the sum of its proper divisors (29031910292).

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

18726508780 is a wasteful number, since it uses less digits than its factorization.

18726508780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28315 (or 28313 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 18726508780 in words is "eighteen billion, seven hundred twenty-six million, five hundred eight thousand, seven hundred eighty".