18955541 has 4 divisors (see below), whose sum is σ = 20678784. Its totient is φ = 17232300.

The previous prime is 18955529. The next prime is 18955583. The reversal of 18955541 is 14555981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18955541 - 2¹⁴ = 18939157 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 18955495 and 18955504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18955511) 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 3 ways as a sum of consecutive naturals, for example, 861605 + ... + 861626.

It is an arithmetic number, because the mean of its divisors is an integer number (5169696).

Almost surely, 2^18955541 is an apocalyptic number.

18955541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18955541 is a deficient number, since it is larger than the sum of its proper divisors (1723243).

18955541 is a wasteful number, since it uses less digits than its factorization.

18955541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723242.

The product of its digits is 36000, while the sum is 38.

The square root of 18955541 is about 4353.7961596749. The cubic root of 18955541 is about 266.6318716754.

It can be divided in two parts, 18 and 955541, that added together give a palindrome (955559).

The spelling of 18955541 in words is "eighteen million, nine hundred fifty-five thousand, five hundred forty-one".