18048761 has 4 divisors (see below), whose sum is σ = 18093300. Its totient is φ = 18004224.

The previous prime is 18048757. The next prime is 18048763. The reversal of 18048761 is 16784081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16784081 = 557 ⋅30133.

It can be written as a sum of positive squares in 2 ways, for example, as 6786025 + 11262736 = 2605^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 18048761 - 2² = 18048757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18048763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21656 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (4523325).

Almost surely, 2^18048761 is an apocalyptic number.

It is an amenable number.

18048761 is a deficient number, since it is larger than the sum of its proper divisors (44539).

18048761 is an equidigital number, since it uses as much as digits as its factorization.

18048761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44538.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 18048761 is about 4248.3833395775. The cubic root of 18048761 is about 262.3105741477.

The spelling of 18048761 in words is "eighteen million, forty-eight thousand, seven hundred sixty-one".