23021377567 has 4 divisors (see below), whose sum is σ = 23051789656. Its totient is φ = 22990965480.

The previous prime is 23021377537. The next prime is 23021377633. The reversal of 23021377567 is 76577312032.

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

It is a cyclic number.

It is not a de Polignac number, because 23021377567 - 2²³ = 23012988959 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 (23021377537) 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, 15204909 + ... + 15206422.

It is an arithmetic number, because the mean of its divisors is an integer number (5762947414).

Almost surely, 2^23021377567 is an apocalyptic number.

23021377567 is a deficient number, since it is larger than the sum of its proper divisors (30412089).

23021377567 is an equidigital number, since it uses as much as digits as its factorization.

23021377567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30412088.

The product of its (nonzero) digits is 370440, while the sum is 43.

Adding to 23021377567 its reverse (76577312032), we get a palindrome (99598689599).

The spelling of 23021377567 in words is "twenty-three billion, twenty-one million, three hundred seventy-seven thousand, five hundred sixty-seven".