19674919958 has 4 divisors (see below), whose sum is σ = 29512379940. Its totient is φ = 9837459978.

The previous prime is 19674919951. The next prime is 19674919967. The reversal of 19674919958 is 85991947691.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19674919951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4918729988 + ... + 4918729991.

It is an arithmetic number, because the mean of its divisors is an integer number (7378094985).

Almost surely, 2^19674919958 is an apocalyptic number.

19674919958 is a deficient number, since it is larger than the sum of its proper divisors (9837459982).

19674919958 is an equidigital number, since it uses as much as digits as its factorization.

19674919958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9837459981.

The product of its digits is 44089920, while the sum is 68.

The spelling of 19674919958 in words is "nineteen billion, six hundred seventy-four million, nine hundred nineteen thousand, nine hundred fifty-eight".