18644510976 has 432 divisors, whose sum is σ = 64905208704. Its totient is φ = 4700602368.

The previous prime is 18644510923. The next prime is 18644510993. The reversal of 18644510976 is 67901544681.

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 47 ways as a sum of consecutive naturals, for example, 11251140 + ... + 11252796.

Almost surely, 2^18644510976 is an apocalyptic number.

18644510976 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 18644510976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32452604352).

18644510976 is an abundant number, since it is smaller than the sum of its proper divisors (46260697728).

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

18644510976 is a wasteful number, since it uses less digits than its factorization.

18644510976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 18644510976 in words is "eighteen billion, six hundred forty-four million, five hundred ten thousand, nine hundred seventy-six".