18637450212 has 24 divisors (see below), whose sum is σ = 44307902016. Its totient is φ = 6095266528.

The previous prime is 18637450211. The next prime is 18637450253. The reversal of 18637450212 is 21205473681.

It is not an unprimeable number, because it can be changed into a prime (18637450211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14651448 + ... + 14652719.

It is an arithmetic number, because the mean of its divisors is an integer number (1846162584).

Almost surely, 2^18637450212 is an apocalyptic number.

18637450212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18637450212 is an abundant number, since it is smaller than the sum of its proper divisors (25670451804).

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

18637450212 is a wasteful number, since it uses less digits than its factorization.

18637450212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29304227 (or 29304225 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 18637450212 in words is "eighteen billion, six hundred thirty-seven million, four hundred fifty thousand, two hundred twelve".