18914240569 has 4 divisors (see below), whose sum is σ = 21616274944. Its totient is φ = 16212206196.

The previous prime is 18914240557. The next prime is 18914240599. The reversal of 18914240569 is 96504241981.

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 18914240569 - 2⁹ = 18914240057 is a prime.

It is a super-2 number, since 2×18914240569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18914240599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351017177 + ... + 1351017190.

It is an arithmetic number, because the mean of its divisors is an integer number (5404068736).

Almost surely, 2^18914240569 is an apocalyptic number.

It is an amenable number.

18914240569 is a deficient number, since it is larger than the sum of its proper divisors (2702034375).

18914240569 is an equidigital number, since it uses as much as digits as its factorization.

18914240569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702034374.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 18914240569 in words is "eighteen billion, nine hundred fourteen million, two hundred forty thousand, five hundred sixty-nine".