18225969 has 8 divisors (see below), whose sum is σ = 24417312. Its totient is φ = 12092640.

The previous prime is 18225967. The next prime is 18225979. The reversal of 18225969 is 96952281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18225969 - 2¹ = 18225967 is a prime.

It is a super-2 number, since 2×18225969² = 664371891977922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18225969.

It is not an unprimeable number, because it can be changed into a prime (18225967) 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 7 ways as a sum of consecutive naturals, for example, 13764 + ... + 15029.

It is an arithmetic number, because the mean of its divisors is an integer number (3052164).

Almost surely, 2^18225969 is an apocalyptic number.

It is an amenable number.

18225969 is a deficient number, since it is larger than the sum of its proper divisors (6191343).

18225969 is a wasteful number, since it uses less digits than its factorization.

18225969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29007.

The product of its digits is 77760, while the sum is 42.

The square root of 18225969 is about 4269.1883303504. The cubic root of 18225969 is about 263.1662603453.

The spelling of 18225969 in words is "eighteen million, two hundred twenty-five thousand, nine hundred sixty-nine".