18712228421383 has 8 divisors (see below), whose sum is σ = 21788902097568. Its totient is φ = 15736429292064.

The previous prime is 18712228421329. The next prime is 18712228421399. The reversal of 18712228421383 is 38312482221781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18712228421383 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 18712228421383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712228431383) 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, 25218636316 + ... + 25218637057.

It is an arithmetic number, because the mean of its divisors is an integer number (2723612762196).

Almost surely, 2^{18712228421383} is an apocalyptic number.

18712228421383 is a deficient number, since it is larger than the sum of its proper divisors (3076673676185).

18712228421383 is an equidigital number, since it uses as much as digits as its factorization.

18712228421383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50437273433.

The product of its digits is 2064384, while the sum is 52.

The spelling of 18712228421383 in words is "eighteen trillion, seven hundred twelve billion, two hundred twenty-eight million, four hundred twenty-one thousand, three hundred eighty-three".