20017506442042 has 16 divisors (see below), whose sum is σ = 30108404817000. Its totient is φ = 9981385701120.

The previous prime is 20017506442019. The next prime is 20017506442121. The reversal of 20017506442042 is 24024460571002.

It can be written as a sum of positive squares in 4 ways, for example, as 14818426979841 + 5199079462201 = 3849471^2 + 2280149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20017506441992 and 20017506442010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726309 + ... + 6368872.

Almost surely, 2^{20017506442042} is an apocalyptic number.

20017506442042 is a deficient number, since it is larger than the sum of its proper divisors (10090898374958).

20017506442042 is a wasteful number, since it uses less digits than its factorization.

20017506442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7099041.

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 20017506442042 in words is "twenty trillion, seventeen billion, five hundred six million, four hundred forty-two thousand, forty-two".