19674304493 has 4 divisors (see below), whose sum is σ = 20831616540. Its totient is φ = 18516992448.

The previous prime is 19674304487. The next prime is 19674304499. The reversal of 19674304493 is 39440347691.

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

It is an interprime number because it is at equal distance from previous prime (19674304487) and next prime (19674304499).

It can be written as a sum of positive squares in 2 ways, for example, as 16347668164 + 3326636329 = 127858^2 + 57677^2 .

It is a cyclic number.

It is not a de Polignac number, because 19674304493 - 2⁴ = 19674304477 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 (19674304499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578655998 + ... + 578656031.

It is an arithmetic number, because the mean of its divisors is an integer number (5207904135).

Almost surely, 2^19674304493 is an apocalyptic number.

It is an amenable number.

19674304493 is a deficient number, since it is larger than the sum of its proper divisors (1157312047).

19674304493 is a wasteful number, since it uses less digits than its factorization.

19674304493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157312046.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 19674304493 in words is "nineteen billion, six hundred seventy-four million, three hundred four thousand, four hundred ninety-three".