18779137440 has 192 divisors, whose sum is σ = 67852318464. Its totient is φ = 4276666368.

The previous prime is 18779137439. The next prime is 18779137453. The reversal of 18779137440 is 4473197781.

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, 920632 + ... + 940808.

It is an arithmetic number, because the mean of its divisors is an integer number (353397492).

Almost surely, 2^18779137440 is an apocalyptic number.

18779137440 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 18779137440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33926159232).

18779137440 is an abundant number, since it is smaller than the sum of its proper divisors (49073181024).

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

18779137440 is a wasteful number, since it uses less digits than its factorization.

18779137440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20479 (or 20471 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 18779137440 in words is "eighteen billion, seven hundred seventy-nine million, one hundred thirty-seven thousand, four hundred forty".