18000461 has 4 divisors (see below), whose sum is σ = 18011424. Its totient is φ = 17989500.

The previous prime is 18000457. The next prime is 18000469. The reversal of 18000461 is 16400081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18000461 - 2² = 18000457 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 (18000469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2465 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (4502856).

Almost surely, 2^18000461 is an apocalyptic number.

It is an amenable number.

18000461 is a deficient number, since it is larger than the sum of its proper divisors (10963).

18000461 is an equidigital number, since it uses as much as digits as its factorization.

18000461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10962.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 18000461 is about 4242.6950161425. The cubic root of 18000461 is about 262.0763767384.

The spelling of 18000461 in words is "eighteen million, four hundred sixty-one", and thus it is an aban number.