18540486 has 12 divisors (see below), whose sum is σ = 40171092. Its totient is φ = 6180156.

The previous prime is 18540481. The next prime is 18540491. The reversal of 18540486 is 68404581.

It is an interprime number because it is at equal distance from previous prime (18540481) and next prime (18540491).

It is a super-2 number, since 2×18540486² = 687499242232392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18540486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18540481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 514996 + ... + 515031.

It is an arithmetic number, because the mean of its divisors is an integer number (3347591).

Almost surely, 2^18540486 is an apocalyptic number.

18540486 is an abundant number, since it is smaller than the sum of its proper divisors (21630606).

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

18540486 is a wasteful number, since it uses less digits than its factorization.

18540486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030035 (or 1030032 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 18540486 is about 4305.8664633265. The cubic root of 18540486 is about 264.6714142658.

The spelling of 18540486 in words is "eighteen million, five hundred forty thousand, four hundred eighty-six".