18506701 has 4 divisors (see below), whose sum is σ = 18517212. Its totient is φ = 18496192.

The previous prime is 18506671. The next prime is 18506717. The reversal of 18506701 is 10760581.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10760581 = 13 ⋅827737.

It can be written as a sum of positive squares in 2 ways, for example, as 14402025 + 4104676 = 3795^2 + 2026^2 .

It is a cyclic number.

It is not a de Polignac number, because 18506701 - 2¹⁷ = 18375629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18506701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506791) 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 3 ways as a sum of consecutive naturals, for example, 1900 + ... + 6373.

It is an arithmetic number, because the mean of its divisors is an integer number (4629303).

Almost surely, 2^18506701 is an apocalyptic number.

It is an amenable number.

18506701 is a deficient number, since it is larger than the sum of its proper divisors (10511).

18506701 is an equidigital number, since it uses as much as digits as its factorization.

18506701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 18506701 is about 4301.9415384219. The cubic root of 18506701 is about 264.5105525954.

The spelling of 18506701 in words is "eighteen million, five hundred six thousand, seven hundred one".