20122231218 has 32 divisors (see below), whose sum is σ = 41782599360. Its totient is φ = 6452725440.

The previous prime is 20122231211. The next prime is 20122231277. The reversal of 20122231218 is 81213222102.

It is not an unprimeable number, because it can be changed into a prime (20122231211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 160548 + ... + 256943.

It is an arithmetic number, because the mean of its divisors is an integer number (1305706230).

Almost surely, 2^20122231218 is an apocalyptic number.

20122231218 is an abundant number, since it is smaller than the sum of its proper divisors (21660368142).

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

20122231218 is a wasteful number, since it uses less digits than its factorization.

20122231218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417802.

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 20122231218 in words is "twenty billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred eighteen".