18816362405 has 8 divisors (see below), whose sum is σ = 22589084952. Its totient is φ = 15046789888.

The previous prime is 18816362393. The next prime is 18816362413. The reversal of 18816362405 is 50426361881.

It can be written as a sum of positive squares in 4 ways, for example, as 220403716 + 18595958689 = 14846^2 + 136367^2 .

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 18816362405 - 2²² = 18812168101 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 774344 + ... + 798273.

It is an arithmetic number, because the mean of its divisors is an integer number (2823635619).

Almost surely, 2^18816362405 is an apocalyptic number.

It is an amenable number.

18816362405 is a deficient number, since it is larger than the sum of its proper divisors (3772722547).

18816362405 is a wasteful number, since it uses less digits than its factorization.

18816362405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575015.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 18816362405 in words is "eighteen billion, eight hundred sixteen million, three hundred sixty-two thousand, four hundred five".