18683280420 has 192 divisors, whose sum is σ = 62574059520. Its totient is φ = 4072476672.

The previous prime is 18683280419. The next prime is 18683280509. The reversal of 18683280420 is 2408238681.

It is a happy number.

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

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, 3407241 + ... + 3412719.

It is an arithmetic number, because the mean of its divisors is an integer number (325906560).

Almost surely, 2^18683280420 is an apocalyptic number.

18683280420 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 18683280420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31287029760).

18683280420 is an abundant number, since it is smaller than the sum of its proper divisors (43890779100).

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

18683280420 is a wasteful number, since it uses less digits than its factorization.

18683280420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874 (or 5872 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 18683280420 in words is "eighteen billion, six hundred eighty-three million, two hundred eighty thousand, four hundred twenty".