18035415616 has 21 divisors (see below), whose sum is σ = 35791159939. Its totient is φ = 9017170624.

The previous prime is 18035415599. The next prime is 18035415623. The reversal of 18035415616 is 61651453081.

The square root of 18035415616 is 134296.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1065975 + ... + 1082761.

Almost surely, 2^18035415616 is an apocalyptic number.

18035415616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18035415616 is the 134296-th square number.

It is an amenable number.

18035415616 is a deficient number, since it is larger than the sum of its proper divisors (17755744323).

18035415616 is an frugal number, since it uses more digits than its factorization.

18035415616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33586 (or 16789 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 18035415616 its reverse (61651453081), we get a palindrome (79686868697).

The spelling of 18035415616 in words is "eighteen billion, thirty-five million, four hundred fifteen thousand, six hundred sixteen".