18220941 has 12 divisors (see below), whose sum is σ = 26399100. Its totient is φ = 12110400.

The previous prime is 18220927. The next prime is 18220967. The reversal of 18220941 is 14902281.

It can be written as a sum of positive squares in 2 ways, for example, as 16232841 + 1988100 = 4029^2 + 1410^2 .

It is not a de Polignac number, because 18220941 - 2⁶ = 18220877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18220841) 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 11 ways as a sum of consecutive naturals, for example, 241 + ... + 6041.

It is an arithmetic number, because the mean of its divisors is an integer number (2199925).

Almost surely, 2^18220941 is an apocalyptic number.

It is an amenable number.

18220941 is a deficient number, since it is larger than the sum of its proper divisors (8178159).

18220941 is a wasteful number, since it uses less digits than its factorization.

18220941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156 (or 6153 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18220941 is about 4268.5994190132. The cubic root of 18220941 is about 263.1420582182.

The spelling of 18220941 in words is "eighteen million, two hundred twenty thousand, nine hundred forty-one".