18660741 has 12 divisors (see below), whose sum is σ = 27349056. Its totient is φ = 11309320.

The previous prime is 18660727. The next prime is 18660743. The reversal of 18660741 is 14706681.

It is a happy number.

It is not a de Polignac number, because 18660741 - 2⁵ = 18660709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18660743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25341 + ... + 26066.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^18660741 is an apocalyptic number.

18660741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18660741 is a deficient number, since it is larger than the sum of its proper divisors (8688315).

18660741 is a wasteful number, since it uses less digits than its factorization.

18660741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51432 (or 51421 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18660741 is about 4319.8079818436. The cubic root of 18660741 is about 265.2424078335.

The spelling of 18660741 in words is "eighteen million, six hundred sixty thousand, seven hundred forty-one".