20039746155 has 32 divisors (see below), whose sum is σ = 37669121280. Its totient is φ = 8968836480.

The previous prime is 20039746147. The next prime is 20039746189. The reversal of 20039746155 is 55164793002.

It is not a de Polignac number, because 20039746155 - 2³ = 20039746147 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4669125 + ... + 4673414.

It is an arithmetic number, because the mean of its divisors is an integer number (1177160040).

Almost surely, 2^20039746155 is an apocalyptic number.

20039746155 is a deficient number, since it is larger than the sum of its proper divisors (17629375125).

20039746155 is a wasteful number, since it uses less digits than its factorization.

20039746155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342571.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 20039746155 in words is "twenty billion, thirty-nine million, seven hundred forty-six thousand, one hundred fifty-five".