19914595979 has 4 divisors (see below), whose sum is σ = 19933331376. Its totient is φ = 19895860584.

The previous prime is 19914595963. The next prime is 19914595993. The reversal of 19914595979 is 97959541991.

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 19914595979 - 2⁴ = 19914595963 is a prime.

It is a super-2 number, since 2×19914595979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19914595949) 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, 9366104 + ... + 9368229.

It is an arithmetic number, because the mean of its divisors is an integer number (4983332844).

Almost surely, 2^19914595979 is an apocalyptic number.

19914595979 is a deficient number, since it is larger than the sum of its proper divisors (18735397).

19914595979 is a wasteful number, since it uses less digits than its factorization.

19914595979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18735396.

The product of its digits is 41334300, while the sum is 68.

The spelling of 19914595979 in words is "nineteen billion, nine hundred fourteen million, five hundred ninety-five thousand, nine hundred seventy-nine".