20136744279 has 12 divisors (see below), whose sum is σ = 29087639256. Its totient is φ = 13423928112.

The previous prime is 20136744259. The next prime is 20136744347. The reversal of 20136744279 is 97244763102.

20136744279 is a `hidden beast` number, since 2 + 0 + 136 + 7 + 442 + 79 = 666.

It is not a de Polignac number, because 20136744279 - 2⁷ = 20136744151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136744259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384217 + ... + 433469.

It is an arithmetic number, because the mean of its divisors is an integer number (2423969938).

Almost surely, 2^20136744279 is an apocalyptic number.

20136744279 is a deficient number, since it is larger than the sum of its proper divisors (8950894977).

20136744279 is a wasteful number, since it uses less digits than its factorization.

20136744279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94686 (or 94683 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 20136744279 in words is "twenty billion, one hundred thirty-six million, seven hundred forty-four thousand, two hundred seventy-nine".