18518061 has 8 divisors (see below), whose sum is σ = 24930880. Its totient is φ = 12225312.

The previous prime is 18518057. The next prime is 18518069. The reversal of 18518061 is 16081581.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18518061 - 2² = 18518057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29656 + ... + 30273.

It is an arithmetic number, because the mean of its divisors is an integer number (3116360).

Almost surely, 2^18518061 is an apocalyptic number.

It is an amenable number.

18518061 is a deficient number, since it is larger than the sum of its proper divisors (6412819).

18518061 is a wasteful number, since it uses less digits than its factorization.

18518061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60035.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 18518061 is about 4303.2616699429. The cubic root of 18518061 is about 264.5646631806.

The spelling of 18518061 in words is "eighteen million, five hundred eighteen thousand, sixty-one".