19390420327679 has 4 divisors (see below), whose sum is σ = 19393003313784. Its totient is φ = 19387837341576.

The previous prime is 19390420327661. The next prime is 19390420327693. The reversal of 19390420327679 is 97672302409391.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19390420327679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19390420627679) 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, 1291481792 + ... + 1291496805.

It is an arithmetic number, because the mean of its divisors is an integer number (4848250828446).

Almost surely, 2^{19390420327679} is an apocalyptic number.

19390420327679 is a deficient number, since it is larger than the sum of its proper divisors (2582986105).

19390420327679 is an equidigital number, since it uses as much as digits as its factorization.

19390420327679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582986104.

The product of its (nonzero) digits is 30862944, while the sum is 62.

The spelling of 19390420327679 in words is "nineteen trillion, three hundred ninety billion, four hundred twenty million, three hundred twenty-seven thousand, six hundred seventy-nine".