18631043536896 has 864 divisors, whose sum is σ = 68017056307200. Its totient is φ = 4880172810240.

The previous prime is 18631043536867. The next prime is 18631043536907. The reversal of 18631043536896 is 69863534013681.

18631043536896 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 1 + 0 + 4 + 3 + 536 + 8 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 531948441 + ... + 531983463.

It is an arithmetic number, because the mean of its divisors is an integer number (78723444800).

Almost surely, 2^{18631043536896} is an apocalyptic number.

18631043536896 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 18631043536896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34008528153600).

18631043536896 is an abundant number, since it is smaller than the sum of its proper divisors (49386012770304).

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

18631043536896 is a wasteful number, since it uses less digits than its factorization.

18631043536896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35115 (or 35085 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 18631043536896 in words is "eighteen trillion, six hundred thirty-one billion, forty-three million, five hundred thirty-six thousand, eight hundred ninety-six".