20500517443 has 24 divisors (see below), whose sum is σ = 24668574000. Its totient is φ = 16973748288.

The previous prime is 20500517441. The next prime is 20500517449. The reversal of 20500517443 is 34471500502.

It is not a de Polignac number, because 20500517443 - 2¹ = 20500517441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20500517441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211333 + ... + 292681.

It is an arithmetic number, because the mean of its divisors is an integer number (1027857250).

Almost surely, 2^20500517443 is an apocalyptic number.

20500517443 is a deficient number, since it is larger than the sum of its proper divisors (4168056557).

20500517443 is a wasteful number, since it uses less digits than its factorization.

20500517443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81539 (or 81532 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 20500517443 in words is "twenty billion, five hundred million, five hundred seventeen thousand, four hundred forty-three".