19674887879 has 4 divisors (see below), whose sum is σ = 19829808384. Its totient is φ = 19519967376.

The previous prime is 19674887863. The next prime is 19674887891. The reversal of 19674887879 is 97878847691.

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 19674887879 - 2⁴ = 19674887863 is a prime.

It is a super-2 number, since 2×19674887879² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19674817879) 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, 77460062 + ... + 77460315.

It is an arithmetic number, because the mean of its divisors is an integer number (4957452096).

Almost surely, 2^19674887879 is an apocalyptic number.

19674887879 is a deficient number, since it is larger than the sum of its proper divisors (154920505).

19674887879 is a wasteful number, since it uses less digits than its factorization.

19674887879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154920504.

The product of its digits is 341397504, while the sum is 74.

The spelling of 19674887879 in words is "nineteen billion, six hundred seventy-four million, eight hundred eighty-seven thousand, eight hundred seventy-nine".