20536871667 has 16 divisors (see below), whose sum is σ = 29493945600. Its totient is φ = 12635887392.

The previous prime is 20536871659. The next prime is 20536871671. The reversal of 20536871667 is 76617863502.

It is not a de Polignac number, because 20536871667 - 2³ = 20536871659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20536871167) 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, 199288 + ... + 284234.

It is an arithmetic number, because the mean of its divisors is an integer number (1843371600).

Almost surely, 2^20536871667 is an apocalyptic number.

20536871667 is a deficient number, since it is larger than the sum of its proper divisors (8957073933).

20536871667 is a wasteful number, since it uses less digits than its factorization.

20536871667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91162.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 20536871667 in words is "twenty billion, five hundred thirty-six million, eight hundred seventy-one thousand, six hundred sixty-seven".