18272633405 has 8 divisors (see below), whose sum is σ = 23613864792. Its totient is φ = 13493636928.

The previous prime is 18272633399. The next prime is 18272633417. The reversal of 18272633405 is 50433627281.

It can be written as a sum of positive squares in 4 ways, for example, as 219217636 + 18053415769 = 14806^2 + 134363^2 .

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 18272633405 - 2¹⁰ = 18272632381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140558654 + ... + 140558783.

It is an arithmetic number, because the mean of its divisors is an integer number (2951733099).

Almost surely, 2^18272633405 is an apocalyptic number.

It is an amenable number.

18272633405 is a deficient number, since it is larger than the sum of its proper divisors (5341231387).

18272633405 is a wasteful number, since it uses less digits than its factorization.

18272633405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281117455.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 18272633405 in words is "eighteen billion, two hundred seventy-two million, six hundred thirty-three thousand, four hundred five".