18979410240 has 896 divisors, whose sum is σ = 80900259840. Its totient is φ = 4097433600.

The previous prime is 18979410239. The next prime is 18979410301. The reversal of 18979410240 is 4201497981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 99368545 + ... + 99368735.

Almost surely, 2^18979410240 is an apocalyptic number.

18979410240 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 18979410240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40450129920).

18979410240 is an abundant number, since it is smaller than the sum of its proper divisors (61920849600).

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

18979410240 is a wasteful number, since it uses less digits than its factorization.

18979410240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 18979410240 in words is "eighteen billion, nine hundred seventy-nine million, four hundred ten thousand, two hundred forty".