20712818671 has 8 divisors (see below), whose sum is σ = 21388492800. Its totient is φ = 20037614520.

The previous prime is 20712818653. The next prime is 20712818689. The reversal of 20712818671 is 17681821702.

It is an interprime number because it is at equal distance from previous prime (20712818653) and next prime (20712818689).

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

It is a cyclic number.

It is not a de Polignac number, because 20712818671 - 2⁵ = 20712818639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20712818771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26791 + ... + 205288.

It is an arithmetic number, because the mean of its divisors is an integer number (2673561600).

Almost surely, 2^20712818671 is an apocalyptic number.

20712818671 is a deficient number, since it is larger than the sum of its proper divisors (675674129).

20712818671 is a wasteful number, since it uses less digits than its factorization.

20712818671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234989.

The product of its (nonzero) digits is 75264, while the sum is 43.

The spelling of 20712818671 in words is "twenty billion, seven hundred twelve million, eight hundred eighteen thousand, six hundred seventy-one".