18430916280 has 256 divisors, whose sum is σ = 65144217600. Its totient is φ = 4084093440.

The previous prime is 18430916279. The next prime is 18430916311. The reversal of 18430916280 is 8261903481.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5018845 + ... + 5022515.

It is an arithmetic number, because the mean of its divisors is an integer number (254469600).

Almost surely, 2^18430916280 is an apocalyptic number.

18430916280 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 18430916280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32572108800).

18430916280 is an abundant number, since it is smaller than the sum of its proper divisors (46713301320).

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

18430916280 is a wasteful number, since it uses less digits than its factorization.

18430916280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874 (or 3870 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 18430916280 in words is "eighteen billion, four hundred thirty million, nine hundred sixteen thousand, two hundred eighty".