24198020221 has 4 divisors (see below), whose sum is σ = 24212281212. Its totient is φ = 24183759232.

The previous prime is 24198020213. The next prime is 24198020237. The reversal of 24198020221 is 12202089142.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12101100025 + 12096920196 = 110005^2 + 109986^2 .

It is a cyclic number.

It is not a de Polignac number, because 24198020221 - 2³ = 24198020213 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 (24198023221) 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, 7127950 + ... + 7131343.

It is an arithmetic number, because the mean of its divisors is an integer number (6053070303).

Almost surely, 2^24198020221 is an apocalyptic number.

It is an amenable number.

24198020221 is a deficient number, since it is larger than the sum of its proper divisors (14260991).

24198020221 is a wasteful number, since it uses less digits than its factorization.

24198020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14260990.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 24198020221 in words is "twenty-four billion, one hundred ninety-eight million, twenty thousand, two hundred twenty-one".