18538064 has 10 divisors (see below), whose sum is σ = 35917530. Its totient is φ = 9269024.

The previous prime is 18538001. The next prime is 18538099. The reversal of 18538064 is 46083581.

It can be written as a sum of positive squares in only one way, i.e., 12816400 + 5721664 = 3580^2 + 2392^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579299 + ... + 579330.

It is an arithmetic number, because the mean of its divisors is an integer number (3591753).

Almost surely, 2^18538064 is an apocalyptic number.

It is an amenable number.

18538064 is a deficient number, since it is larger than the sum of its proper divisors (17379466).

18538064 is a wasteful number, since it uses less digits than its factorization.

18538064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158637 (or 1158631 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 18538064 is about 4305.5852099337. The cubic root of 18538064 is about 264.6598888204.

The spelling of 18538064 in words is "eighteen million, five hundred thirty-eight thousand, sixty-four".