23845744221 has 16 divisors (see below), whose sum is σ = 34247631936. Its totient is φ = 14671051776.

The previous prime is 23845744217. The next prime is 23845744271. The reversal of 23845744221 is 12244754832.

It is a happy number.

It is not a de Polignac number, because 23845744221 - 2² = 23845744217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23845744271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116826 + ... + 247668.

It is an arithmetic number, because the mean of its divisors is an integer number (2140476996).

Almost surely, 2^23845744221 is an apocalyptic number.

It is an amenable number.

23845744221 is a deficient number, since it is larger than the sum of its proper divisors (10401887715).

23845744221 is a wasteful number, since it uses less digits than its factorization.

23845744221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135532.

The product of its digits is 430080, while the sum is 42.

The spelling of 23845744221 in words is "twenty-three billion, eight hundred forty-five million, seven hundred forty-four thousand, two hundred twenty-one".