23220055645 has 16 divisors (see below), whose sum is σ = 28271185920. Its totient is φ = 18305539200.

The previous prime is 23220055631. The next prime is 23220055657. The reversal of 23220055645 is 54655002232.

It is not a de Polignac number, because 23220055645 - 2¹³ = 23220047453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23220055645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149380 + ... + 262210.

It is an arithmetic number, because the mean of its divisors is an integer number (1766949120).

Almost surely, 2^23220055645 is an apocalyptic number.

It is an amenable number.

23220055645 is a deficient number, since it is larger than the sum of its proper divisors (5051130275).

23220055645 is a wasteful number, since it uses less digits than its factorization.

23220055645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113436.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 23220055645 its reverse (54655002232), we get a palindrome (77875057877).

The spelling of 23220055645 in words is "twenty-three billion, two hundred twenty million, fifty-five thousand, six hundred forty-five".