18514516 has 6 divisors (see below), whose sum is σ = 32400410. Its totient is φ = 9257256.

The previous prime is 18514511. The next prime is 18514549. The reversal of 18514516 is 61541581.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 5982916 = 3540^2 + 2446^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18514511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2314311 + ... + 2314318.

Almost surely, 2^18514516 is an apocalyptic number.

It is an amenable number.

18514516 is a deficient number, since it is larger than the sum of its proper divisors (13885894).

18514516 is a wasteful number, since it uses less digits than its factorization.

18514516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4628633 (or 4628631 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 18514516 is about 4302.8497533611. The cubic root of 18514516 is about 264.5477798150.

The spelling of 18514516 in words is "eighteen million, five hundred fourteen thousand, five hundred sixteen".