12920361018 has 16 divisors (see below), whose sum is σ = 25843345920. Its totient is φ = 4306349696.

The previous prime is 12920361011. The next prime is 12920361023. The reversal of 12920361018 is 81016302921.

It is a self number, because there is not a number n which added to its sum of digits gives 12920361018.

It is not an unprimeable number, because it can be changed into a prime (12920361011) 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, 42138 + ... + 166181.

It is an arithmetic number, because the mean of its divisors is an integer number (1615209120).

Almost surely, 2^12920361018 is an apocalyptic number.

12920361018 is an abundant number, since it is smaller than the sum of its proper divisors (12922984902).

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

12920361018 is a wasteful number, since it uses less digits than its factorization.

12920361018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218661.

The product of its (nonzero) digits is 5184, while the sum is 33.

Adding to 12920361018 its reverse (81016302921), we get a palindrome (93936663939).

The spelling of 12920361018 in words is "twelve billion, nine hundred twenty million, three hundred sixty-one thousand, eighteen".