18476486820 has 576 divisors, whose sum is σ = 65868042240. Its totient is φ = 4151347200.

The previous prime is 18476486761. The next prime is 18476486837. The reversal of 18476486820 is 2868467481.

18476486820 is a `hidden beast` number, since 1 + 84 + 7 + 6 + 486 + 82 + 0 = 666.

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 191 ways as a sum of consecutive naturals, for example, 233879541 + ... + 233879619.

It is an arithmetic number, because the mean of its divisors is an integer number (114354240).

Almost surely, 2^18476486820 is an apocalyptic number.

18476486820 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 18476486820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32934021120).

18476486820 is an abundant number, since it is smaller than the sum of its proper divisors (47391555420).

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

18476486820 is a wasteful number, since it uses less digits than its factorization.

18476486820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 54.

The spelling of 18476486820 in words is "eighteen billion, four hundred seventy-six million, four hundred eighty-six thousand, eight hundred twenty".