18441969 has 32 divisors (see below), whose sum is σ = 30987264. Its totient is φ = 9495360.

The previous prime is 18441967. The next prime is 18441971. The reversal of 18441969 is 96914481.

It is an interprime number because it is at equal distance from previous prime (18441967) and next prime (18441971).

It is not a de Polignac number, because 18441969 - 2¹ = 18441967 is a prime.

It is a super-2 number, since 2×18441969² = 680212441193922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18441969.

It is not an unprimeable number, because it can be changed into a prime (18441961) 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 31 ways as a sum of consecutive naturals, for example, 10954 + ... + 12524.

It is an arithmetic number, because the mean of its divisors is an integer number (968352).

Almost surely, 2^18441969 is an apocalyptic number.

It is an amenable number.

18441969 is a deficient number, since it is larger than the sum of its proper divisors (12545295).

18441969 is a wasteful number, since it uses less digits than its factorization.

18441969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637.

The product of its digits is 62208, while the sum is 42.

The square root of 18441969 is about 4294.4113682785. The cubic root of 18441969 is about 264.2017941768.

The spelling of 18441969 in words is "eighteen million, four hundred forty-one thousand, nine hundred sixty-nine".