20672238567 has 4 divisors (see below), whose sum is σ = 27562984760. Its totient is φ = 13781492376.

The previous prime is 20672238551. The next prime is 20672238611. The reversal of 20672238567 is 76583227602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20672238567 - 2⁴ = 20672238551 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 (20672238547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445373092 + ... + 3445373097.

It is an arithmetic number, because the mean of its divisors is an integer number (6890746190).

Almost surely, 2^20672238567 is an apocalyptic number.

20672238567 is a deficient number, since it is larger than the sum of its proper divisors (6890746193).

20672238567 is an equidigital number, since it uses as much as digits as its factorization.

20672238567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890746192.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 20672238567 in words is "twenty billion, six hundred seventy-two million, two hundred thirty-eight thousand, five hundred sixty-seven".