20174812218 has 48 divisors (see below), whose sum is σ = 50195714400. Its totient is φ = 5791811040.

The previous prime is 20174812213. The next prime is 20174812219. The reversal of 20174812218 is 81221847102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20174812213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2677633 + ... + 2685156.

It is an arithmetic number, because the mean of its divisors is an integer number (1045744050).

Almost surely, 2^20174812218 is an apocalyptic number.

20174812218 is an abundant number, since it is smaller than the sum of its proper divisors (30020902182).

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

20174812218 is a wasteful number, since it uses less digits than its factorization.

20174812218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362827 (or 5362824 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The spelling of 20174812218 in words is "twenty billion, one hundred seventy-four million, eight hundred twelve thousand, two hundred eighteen".