20938710573 has 32 divisors (see below), whose sum is σ = 33848929920. Its totient is φ = 12686906880.

The previous prime is 20938710563. The next prime is 20938710577. The reversal of 20938710573 is 37501783902.

It is a happy number.

20938710573 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 8 + 71 + 0 + 573 = 666.

It is not a de Polignac number, because 20938710573 - 2⁶ = 20938710509 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20938710577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1733511 + ... + 1745547.

It is an arithmetic number, because the mean of its divisors is an integer number (1057779060).

Almost surely, 2^20938710573 is an apocalyptic number.

It is an amenable number.

20938710573 is a deficient number, since it is larger than the sum of its proper divisors (12910219347).

20938710573 is a wasteful number, since it uses less digits than its factorization.

20938710573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17914 (or 17908 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 20938710573 in words is "twenty billion, nine hundred thirty-eight million, seven hundred ten thousand, five hundred seventy-three".