20000020999973 has 48 divisors (see below), whose sum is σ = 23660206582464. Its totient is φ = 16852984727040.

The previous prime is 20000020999967. The next prime is 20000020999997. The reversal of 20000020999973 is 37999902000002.

It is not a de Polignac number, because 20000020999973 - 2¹⁴ = 20000020983589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000020999073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4385005613 + ... + 4385010173.

It is an arithmetic number, because the mean of its divisors is an integer number (492920970468).

Almost surely, 2^{20000020999973} is an apocalyptic number.

It is an amenable number.

20000020999973 is a deficient number, since it is larger than the sum of its proper divisors (3660185582491).

20000020999973 is a wasteful number, since it uses less digits than its factorization.

20000020999973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042 (or 7035 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 50.

Adding to 20000020999973 its reverse (37999902000002), we get a palindrome (57999922999975).

The spelling of 20000020999973 in words is "twenty trillion, twenty million, nine hundred ninety-nine thousand, nine hundred seventy-three".