18069540 has 24 divisors (see below), whose sum is σ = 50594880. Its totient is φ = 4818528.

The previous prime is 18069539. The next prime is 18069563. The reversal of 18069540 is 4596081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150520 + ... + 150639.

It is an arithmetic number, because the mean of its divisors is an integer number (2108120).

Almost surely, 2^18069540 is an apocalyptic number.

18069540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18069540 is an abundant number, since it is smaller than the sum of its proper divisors (32525340).

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

18069540 is a wasteful number, since it uses less digits than its factorization.

18069540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301171 (or 301169 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 18069540 is about 4250.8281546071. The cubic root of 18069540 is about 262.4111989879.

The spelling of 18069540 in words is "eighteen million, sixty-nine thousand, five hundred forty".