1312023032018 has 4 divisors (see below), whose sum is σ = 1968034548030. Its totient is φ = 656011516008.

The previous prime is 1312023032017. The next prime is 1312023032057. The reversal of 1312023032018 is 8102303202131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1121432286529 + 190590745489 = 1058977^2 + 436567^2 .

It is not an unprimeable number, because it can be changed into a prime (1312023032017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328005758003 + ... + 328005758006.

Almost surely, 2^{1312023032018} is an apocalyptic number.

1312023032018 is a deficient number, since it is larger than the sum of its proper divisors (656011516012).

1312023032018 is an equidigital number, since it uses as much as digits as its factorization.

1312023032018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656011516011.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1312023032018 its reverse (8102303202131), we get a palindrome (9414326234149).

The spelling of 1312023032018 in words is "one trillion, three hundred twelve billion, twenty-three million, thirty-two thousand, eighteen".