19926877877 has 4 divisors (see below), whose sum is σ = 19966812000. Its totient is φ = 19886943756.

The previous prime is 19926877849. The next prime is 19926877939. The reversal of 19926877877 is 77877862991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19926877877 - 2¹² = 19926873781 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 19926877877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19926870877) 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 in 3 ways as a sum of consecutive naturals, for example, 19966313 + ... + 19967310.

It is an arithmetic number, because the mean of its divisors is an integer number (4991703000).

Almost surely, 2^19926877877 is an apocalyptic number.

It is an amenable number.

19926877877 is a deficient number, since it is larger than the sum of its proper divisors (39934123).

19926877877 is an equidigital number, since it uses as much as digits as its factorization.

19926877877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39934122.

The product of its digits is 149361408, while the sum is 71.

The spelling of 19926877877 in words is "nineteen billion, nine hundred twenty-six million, eight hundred seventy-seven thousand, eight hundred seventy-seven".