18200640055 has 40 divisors (see below), whose sum is σ = 23805757872. Its totient is φ = 13358322432.

The previous prime is 18200640049. The next prime is 18200640061. The reversal of 18200640055 is 55004600281.

It is an interprime number because it is at equal distance from previous prime (18200640049) and next prime (18200640061).

It is not a de Polignac number, because 18200640055 - 2¹¹ = 18200638007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18200639999 and 18200640026.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33273292 + ... + 33273838.

Almost surely, 2^18200640055 is an apocalyptic number.

18200640055 is a deficient number, since it is larger than the sum of its proper divisors (5605117817).

18200640055 is an frugal number, since it uses more digits than its factorization.

18200640055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 18200640055 in words is "eighteen billion, two hundred million, six hundred forty thousand, fifty-five".