18628208407 has 8 divisors (see below), whose sum is σ = 19250154000. Its totient is φ = 18014841600.

The previous prime is 18628208393. The next prime is 18628208429. The reversal of 18628208407 is 70480282681.

It is a happy number.

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 18628208407 - 2¹⁵ = 18628175639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628208447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2140282 + ... + 2148967.

It is an arithmetic number, because the mean of its divisors is an integer number (2406269250).

Almost surely, 2^18628208407 is an apocalyptic number.

18628208407 is a deficient number, since it is larger than the sum of its proper divisors (621945593).

18628208407 is a wasteful number, since it uses less digits than its factorization.

18628208407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289393.

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 18628208407 in words is "eighteen billion, six hundred twenty-eight million, two hundred eight thousand, four hundred seven".