18930569 has 8 divisors (see below), whose sum is σ = 22219968. Its totient is φ = 15787440.

The previous prime is 18930539. The next prime is 18930577. The reversal of 18930569 is 96503981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18930569 is a prime.

It is a super-2 number, since 2×18930569² = 716732885327522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18930529) 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, 36287 + ... + 36804.

It is an arithmetic number, because the mean of its divisors is an integer number (2777496).

Almost surely, 2^18930569 is an apocalyptic number.

It is an amenable number.

18930569 is a deficient number, since it is larger than the sum of its proper divisors (3289399).

18930569 is an equidigital number, since it uses as much as digits as its factorization.

18930569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73135.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 18930569 is about 4350.9273724115. The cubic root of 18930569 is about 266.5147334178.

The spelling of 18930569 in words is "eighteen million, nine hundred thirty thousand, five hundred sixty-nine".