18424978530 has 192 divisors, whose sum is σ = 52299209088. Its totient is φ = 4141670400.

The previous prime is 18424978511. The next prime is 18424978531. The reversal of 18424978530 is 3587942481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18424978531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28654389 + ... + 28655031.

It is an arithmetic number, because the mean of its divisors is an integer number (272391714).

Almost surely, 2^18424978530 is an apocalyptic number.

18424978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18424978530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26149604544).

18424978530 is an abundant number, since it is smaller than the sum of its proper divisors (33874230558).

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

18424978530 is a wasteful number, since it uses less digits than its factorization.

18424978530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 18424978530 in words is "eighteen billion, four hundred twenty-four million, nine hundred seventy-eight thousand, five hundred thirty".