18520485 has 16 divisors (see below), whose sum is σ = 30589440. Its totient is φ = 9558720.

The previous prime is 18520477. The next prime is 18520493. The reversal of 18520485 is 58402581.

It is an interprime number because it is at equal distance from previous prime (18520477) and next prime (18520493).

It is not a de Polignac number, because 18520485 - 2³ = 18520477 is a prime.

It is a congruent number.

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, 19450 + ... + 20379.

It is an arithmetic number, because the mean of its divisors is an integer number (1911840).

Almost surely, 2^18520485 is an apocalyptic number.

18520485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18520485 is a deficient number, since it is larger than the sum of its proper divisors (12068955).

18520485 is a wasteful number, since it uses less digits than its factorization.

18520485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39868.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 18520485 is about 4303.5433075548. The cubic root of 18520485 is about 264.5762064476.

The spelling of 18520485 in words is "eighteen million, five hundred twenty thousand, four hundred eighty-five".