18872269779 has 16 divisors (see below), whose sum is σ = 27452880000. Its totient is φ = 11436778560.

The previous prime is 18872269751. The next prime is 18872269799. The reversal of 18872269779 is 97796227881.

It is not a de Polignac number, because 18872269779 - 2⁵ = 18872269747 is a prime.

It is a super-2 number, since 2×18872269779² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18872269799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705847 + ... + 732095.

It is an arithmetic number, because the mean of its divisors is an integer number (1715805000).

Almost surely, 2^18872269779 is an apocalyptic number.

18872269779 is a deficient number, since it is larger than the sum of its proper divisors (8580610221).

18872269779 is a wasteful number, since it uses less digits than its factorization.

18872269779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48050.

The product of its digits is 42674688, while the sum is 66.

The spelling of 18872269779 in words is "eighteen billion, eight hundred seventy-two million, two hundred sixty-nine thousand, seven hundred seventy-nine".