18782541 has 6 divisors (see below), whose sum is σ = 27130350. Its totient is φ = 12521688.

The previous prime is 18782531. The next prime is 18782557. The reversal of 18782541 is 14528781.

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 9326916 = 3075^2 + 3054^2 .

It is not a de Polignac number, because 18782541 - 2⁵ = 18782509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18782496 and 18782505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18782531) 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 5 ways as a sum of consecutive naturals, for example, 1043466 + ... + 1043483.

It is an arithmetic number, because the mean of its divisors is an integer number (4521725).

Almost surely, 2^18782541 is an apocalyptic number.

It is an amenable number.

18782541 is a deficient number, since it is larger than the sum of its proper divisors (8347809).

18782541 is a wasteful number, since it uses less digits than its factorization.

18782541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086955 (or 2086952 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 18782541 is about 4333.8829010484. The cubic root of 18782541 is about 265.8182422380.

It can be divided in two parts, 187 and 82541, that added together give a palindrome (82728).

The spelling of 18782541 in words is "eighteen million, seven hundred eighty-two thousand, five hundred forty-one".