20606015639979 has 192 divisors, whose sum is σ = 37513082880000. Its totient is φ = 10588649702400.

The previous prime is 20606015639953. The next prime is 20606015640053. The reversal of 20606015639979 is 97993651060602.

20606015639979 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 60 + 1 + 563 + 9 + 9 + 7 + 9 = 666.

It is not a de Polignac number, because 20606015639979 - 2³³ = 20597425705387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20606015639779) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 23389347619 + ... + 23389348499.

It is an arithmetic number, because the mean of its divisors is an integer number (195380640000).

Almost surely, 2^{20606015639979} is an apocalyptic number.

20606015639979 is a deficient number, since it is larger than the sum of its proper divisors (16907067240021).

20606015639979 is a wasteful number, since it uses less digits than its factorization.

20606015639979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 33067440, while the sum is 63.

The spelling of 20606015639979 in words is "twenty trillion, six hundred six billion, fifteen million, six hundred thirty-nine thousand, nine hundred seventy-nine".