20011983173 has 16 divisors (see below), whose sum is σ = 24926891136. Its totient is φ = 15642884160.

The previous prime is 20011983163. The next prime is 20011983179. The reversal of 20011983173 is 37138911002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20011983173 - 2⁴ = 20011983157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011983179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317218 + ... + 1332323.

It is an arithmetic number, because the mean of its divisors is an integer number (1557930696).

Almost surely, 2^20011983173 is an apocalyptic number.

It is an amenable number.

20011983173 is a deficient number, since it is larger than the sum of its proper divisors (4914907963).

20011983173 is a wasteful number, since it uses less digits than its factorization.

20011983173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649644.

The product of its (nonzero) digits is 9072, while the sum is 35.

The spelling of 20011983173 in words is "twenty billion, eleven million, nine hundred eighty-three thousand, one hundred seventy-three".