20667250067 has 4 divisors (see below), whose sum is σ = 20667653160. Its totient is φ = 20666846976.

The previous prime is 20667250063. The next prime is 20667250127. The reversal of 20667250067 is 76005276602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76005276602 = 2 ⋅38002638301.

It is a cyclic number.

It is not a de Polignac number, because 20667250067 - 2² = 20667250063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20667250063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111113 + ... + 231690.

It is an arithmetic number, because the mean of its divisors is an integer number (5166913290).

Almost surely, 2^20667250067 is an apocalyptic number.

20667250067 is a deficient number, since it is larger than the sum of its proper divisors (403093).

20667250067 is an equidigital number, since it uses as much as digits as its factorization.

20667250067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403092.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 20667250067 in words is "twenty billion, six hundred sixty-seven million, two hundred fifty thousand, sixty-seven".