18045644976 has 240 divisors, whose sum is σ = 54340584480. Its totient is φ = 5570519040.

The previous prime is 18045644963. The next prime is 18045644983. The reversal of 18045644976 is 67944654081.

18045644976 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 564 + 4 + 9 + 76 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61589086 + ... + 61589378.

It is an arithmetic number, because the mean of its divisors is an integer number (226419102).

Almost surely, 2^18045644976 is an apocalyptic number.

18045644976 is a gapful number since it is divisible by the number (16) 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 18045644976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27170292240).

18045644976 is an abundant number, since it is smaller than the sum of its proper divisors (36294939504).

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

18045644976 is a wasteful number, since it uses less digits than its factorization.

18045644976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 18045644976 in words is "eighteen billion, forty-five million, six hundred forty-four thousand, nine hundred seventy-six".