18724084465 has 8 divisors (see below), whose sum is σ = 23243691240. Its totient is φ = 14462740992.

The previous prime is 18724084441. The next prime is 18724084493. The reversal of 18724084465 is 56448042781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1341244129 + 17382840336 = 36623^2 + 131844^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18724084465 - 2⁹ = 18724083953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64565664 + ... + 64565953.

It is an arithmetic number, because the mean of its divisors is an integer number (2905461405).

Almost surely, 2^18724084465 is an apocalyptic number.

It is an amenable number.

18724084465 is a deficient number, since it is larger than the sum of its proper divisors (4519606775).

18724084465 is a wasteful number, since it uses less digits than its factorization.

18724084465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129131651.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 18724084465 in words is "eighteen billion, seven hundred twenty-four million, eighty-four thousand, four hundred sixty-five".