18630212064 has 48 divisors (see below), whose sum is σ = 49030122960. Its totient is φ = 6194094080.

The previous prime is 18630212033. The next prime is 18630212087. The reversal of 18630212064 is 46021203681.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18630212064² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212097 + ... + 286784.

It is an arithmetic number, because the mean of its divisors is an integer number (1021460895).

Almost surely, 2^18630212064 is an apocalyptic number.

It is an amenable number.

18630212064 is an abundant number, since it is smaller than the sum of its proper divisors (30399910896).

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

18630212064 is a wasteful number, since it uses less digits than its factorization.

18630212064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499283 (or 499275 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 18630212064 in words is "eighteen billion, six hundred thirty million, two hundred twelve thousand, sixty-four".