20134235979 has 54 divisors (see below), whose sum is σ = 34386265836. Its totient is φ = 11253640320.

The previous prime is 20134235977. The next prime is 20134235987. The reversal of 20134235979 is 97953243102.

20134235979 is a `hidden beast` number, since 2 + 0 + 1 + 34 + 23 + 597 + 9 = 666.

It is not a de Polignac number, because 20134235979 - 2¹ = 20134235977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20134235977) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 18353359 + ... + 18354455.

Almost surely, 2^20134235979 is an apocalyptic number.

20134235979 is a deficient number, since it is larger than the sum of its proper divisors (14252029857).

20134235979 is a wasteful number, since it uses less digits than its factorization.

20134235979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 20134235979 in words is "twenty billion, one hundred thirty-four million, two hundred thirty-five thousand, nine hundred seventy-nine".