12918895623533 has 4 divisors (see below), whose sum is σ = 12919628711328. Its totient is φ = 12918162535740.

The previous prime is 12918895623523. The next prime is 12918895623547. The reversal of 12918895623533 is 33532659881921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12918895623533 - 2¹⁸ = 12918895361389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12918895623533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918895623523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366517463 + ... + 366552708.

It is an arithmetic number, because the mean of its divisors is an integer number (3229907177832).

Almost surely, 2^{12918895623533} is an apocalyptic number.

It is an amenable number.

12918895623533 is a deficient number, since it is larger than the sum of its proper divisors (733087795).

12918895623533 is an equidigital number, since it uses as much as digits as its factorization.

12918895623533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733087794.

The product of its digits is 83980800, while the sum is 65.

The spelling of 12918895623533 in words is "twelve trillion, nine hundred eighteen billion, eight hundred ninety-five million, six hundred twenty-three thousand, five hundred thirty-three".