18535545 has 72 divisors (see below), whose sum is σ = 38990016. Its totient is φ = 7978176.

The previous prime is 18535541. The next prime is 18535549. The reversal of 18535545 is 54553581.

It is a happy number.

18535545 is a `hidden beast` number, since 1 + 85 + 35 + 545 = 666.

It is an interprime number because it is at equal distance from previous prime (18535541) and next prime (18535549).

It is not a de Polignac number, because 18535545 - 2² = 18535541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18535541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 113634 + ... + 113796.

It is an arithmetic number, because the mean of its divisors is an integer number (541528).

Almost surely, 2^18535545 is an apocalyptic number.

18535545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18535545 is an abundant number, since it is smaller than the sum of its proper divisors (20454471).

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

18535545 is a wasteful number, since it uses less digits than its factorization.

18535545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 197 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 18535545 is about 4305.2926729782. The cubic root of 18535545 is about 264.6479007210.

The spelling of 18535545 in words is "eighteen million, five hundred thirty-five thousand, five hundred forty-five".