20320711667 has 8 divisors (see below), whose sum is σ = 20572438320. Its totient is φ = 20069505280.

The previous prime is 20320711661. The next prime is 20320711673. The reversal of 20320711667 is 76611702302.

It is an interprime number because it is at equal distance from previous prime (20320711661) and next prime (20320711673).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320711667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320711661) 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, 51173 + ... + 207990.

It is an arithmetic number, because the mean of its divisors is an integer number (2571554790).

Almost surely, 2^20320711667 is an apocalyptic number.

20320711667 is a deficient number, since it is larger than the sum of its proper divisors (251726653).

20320711667 is an equidigital number, since it uses as much as digits as its factorization.

20320711667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260133.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 20320711667 in words is "twenty billion, three hundred twenty million, seven hundred eleven thousand, six hundred sixty-seven".