18620351005 has 16 divisors (see below), whose sum is σ = 23663689920. Its totient is φ = 14017130752.

The previous prime is 18620350993. The next prime is 18620351093. The reversal of 18620351005 is 50015302681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18620351005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448206 + ... + 487984.

It is an arithmetic number, because the mean of its divisors is an integer number (1478980620).

Almost surely, 2^18620351005 is an apocalyptic number.

It is an amenable number.

18620351005 is a deficient number, since it is larger than the sum of its proper divisors (5043338915).

18620351005 is a wasteful number, since it uses less digits than its factorization.

18620351005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45308.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 18620351005 its reverse (50015302681), we get a palindrome (68635653686).

The spelling of 18620351005 in words is "eighteen billion, six hundred twenty million, three hundred fifty-one thousand, five".