18681701 has 8 divisors (see below), whose sum is σ = 19405440. Its totient is φ = 17971648.

The previous prime is 18681697. The next prime is 18681709. The reversal of 18681701 is 10718681.

18681701 is nontrivially palindromic in base 7.

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

It is a cyclic number.

It is not a de Polignac number, because 18681701 - 2² = 18681697 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 (18681709) 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 7 ways as a sum of consecutive naturals, for example, 596 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (2425680).

Almost surely, 2^18681701 is an apocalyptic number.

It is an amenable number.

18681701 is a deficient number, since it is larger than the sum of its proper divisors (723739).

18681701 is an equidigital number, since it uses as much as digits as its factorization.

18681701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6843.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 18681701 is about 4322.2333347472. The cubic root of 18681701 is about 265.3416786443.

The spelling of 18681701 in words is "eighteen million, six hundred eighty-one thousand, seven hundred one".