18433489643776 has 243 divisors, whose sum is σ = 38592086064987. Its totient is φ = 8787436769280.

The previous prime is 18433489643749. The next prime is 18433489643819. The reversal of 18433489643776 is 67734698433481.

The square root of 18433489643776 is 4293424.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2476468742400 + 15957020901376 = 1573680^2 + 3994624^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18433489643699 and 18433489643708.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 222090236631 + ... + 222090236713.

Almost surely, 2^{18433489643776} is an apocalyptic number.

18433489643776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18433489643776 is the 4293424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18433489643776

18433489643776 is an abundant number, since it is smaller than the sum of its proper divisors (20158596421211).

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

18433489643776 is an frugal number, since it uses more digits than its factorization.

18433489643776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 199 counting only the distinct ones).

The product of its digits is 1755758592, while the sum is 73.

The spelling of 18433489643776 in words is "eighteen trillion, four hundred thirty-three billion, four hundred eighty-nine million, six hundred forty-three thousand, seven hundred seventy-six".