20168515671 has 8 divisors (see below), whose sum is σ = 27270105984. Its totient is φ = 13256301240.

The previous prime is 20168515651. The next prime is 20168515729. The reversal of 20168515671 is 17651586102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20168515671 - 2⁵ = 20168515639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168515651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47343721 + ... + 47344146.

It is an arithmetic number, because the mean of its divisors is an integer number (3408763248).

Almost surely, 2^20168515671 is an apocalyptic number.

20168515671 is a deficient number, since it is larger than the sum of its proper divisors (7101590313).

20168515671 is an equidigital number, since it uses as much as digits as its factorization.

20168515671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94687941.

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 20168515671 in words is "twenty billion, one hundred sixty-eight million, five hundred fifteen thousand, six hundred seventy-one".