19374272043947 has 4 divisors (see below), whose sum is σ = 20042350390320. Its totient is φ = 18706193697576.

The previous prime is 19374272043923. The next prime is 19374272044007. The reversal of 19374272043947 is 74934027247391.

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

It is a cyclic number.

It is not a de Polignac number, because 19374272043947 - 2⁸ = 19374272043691 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 19374272043947.

It is not an unprimeable number, because it can be changed into a prime (19374272033947) 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, 334039173143 + ... + 334039173200.

It is an arithmetic number, because the mean of its divisors is an integer number (5010587597580).

Almost surely, 2^{19374272043947} is an apocalyptic number.

19374272043947 is a deficient number, since it is larger than the sum of its proper divisors (668078346373).

19374272043947 is an equidigital number, since it uses as much as digits as its factorization.

19374272043947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668078346372.

The product of its (nonzero) digits is 64012032, while the sum is 62.

The spelling of 19374272043947 in words is "nineteen trillion, three hundred seventy-four billion, two hundred seventy-two million, forty-three thousand, nine hundred forty-seven".