18260736 has 144 divisors (see below), whose sum is σ = 54942720. Its totient is φ = 5345280.

The previous prime is 18260717. The next prime is 18260743. The reversal of 18260736 is 63706281.

It is a junction number, because it is equal to n+sod(n) for n = 18260697 and 18260706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309475 + ... + 309533.

Almost surely, 2^18260736 is an apocalyptic number.

18260736 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 18260736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27471360).

18260736 is an abundant number, since it is smaller than the sum of its proper divisors (36681984).

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

18260736 is a wasteful number, since it uses less digits than its factorization.

18260736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 18260736 is about 4273.2582416699. The cubic root of 18260736 is about 263.3334885790. Note that the first 3 decimals are identical.

The spelling of 18260736 in words is "eighteen million, two hundred sixty thousand, seven hundred thirty-six".