18752661 has 16 divisors (see below), whose sum is σ = 27958720. Its totient is φ = 12422160.

The previous prime is 18752653. The next prime is 18752663. The reversal of 18752661 is 16625781.

It is not a de Polignac number, because 18752661 - 2³ = 18752653 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 (18752663) 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 15 ways as a sum of consecutive naturals, for example, 2271 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (1747420).

Almost surely, 2^18752661 is an apocalyptic number.

It is an amenable number.

18752661 is a deficient number, since it is larger than the sum of its proper divisors (9206059).

18752661 is a wasteful number, since it uses less digits than its factorization.

18752661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4427 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 18752661 is about 4330.4342738344. The cubic root of 18752661 is about 265.6772094098.

The spelling of 18752661 in words is "eighteen million, seven hundred fifty-two thousand, six hundred sixty-one".