18620351008 has 48 divisors (see below), whose sum is σ = 41928171264. Its totient is φ = 7973982720.

The previous prime is 18620350993. The next prime is 18620351093. The reversal of 18620351008 is 80015302681.

It is a super-2 number, since 2×18620351008² (a number of 21 digits) contains 22 as substring.

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, 264441 + ... + 327367.

It is an arithmetic number, because the mean of its divisors is an integer number (873503568).

Almost surely, 2^18620351008 is an apocalyptic number.

It is an amenable number.

18620351008 is an abundant number, since it is smaller than the sum of its proper divisors (23307820256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18620351008 is a wasteful number, since it uses less digits than its factorization.

18620351008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64265 (or 64257 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 18620351008 its reverse (80015302681), we get a palindrome (98635653689).

The spelling of 18620351008 in words is "eighteen billion, six hundred twenty million, three hundred fifty-one thousand, eight".