20384109279 has 24 divisors (see below), whose sum is σ = 30578168192. Its totient is φ = 13075246800.

The previous prime is 20384109271. The next prime is 20384109299. The reversal of 20384109279 is 97290148302.

20384109279 is a `hidden beast` number, since 203 + 8 + 410 + 9 + 27 + 9 = 666.

It is not a de Polignac number, because 20384109279 - 2³ = 20384109271 is a prime.

It is a super-2 number, since 2×20384109279² (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 (20384109271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367147 + ... + 419004.

Almost surely, 2^20384109279 is an apocalyptic number.

20384109279 is a deficient number, since it is larger than the sum of its proper divisors (10194058913).

20384109279 is a wasteful number, since it uses less digits than its factorization.

20384109279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786267 (or 786264 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20384109279 in words is "twenty billion, three hundred eighty-four million, one hundred nine thousand, two hundred seventy-nine".