20244451526221 has 8 divisors (see below), whose sum is σ = 22017575614104. Its totient is φ = 18502164379200.

The previous prime is 20244451526219. The next prime is 20244451526293. The reversal of 20244451526221 is 12262515444202.

It can be written as a sum of positive squares in 4 ways, for example, as 459622982025 + 19784828544196 = 677955^2 + 4448014^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20244451526221 - 2¹ = 20244451526219 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 (20244451526021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709233846 + ... + 7709236471.

It is an arithmetic number, because the mean of its divisors is an integer number (2752196951763).

Almost surely, 2^{20244451526221} is an apocalyptic number.

It is an amenable number.

20244451526221 is a deficient number, since it is larger than the sum of its proper divisors (1773124087883).

20244451526221 is a wasteful number, since it uses less digits than its factorization.

20244451526221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15418470431.

The product of its (nonzero) digits is 307200, while the sum is 40.

The spelling of 20244451526221 in words is "twenty trillion, two hundred forty-four billion, four hundred fifty-one million, five hundred twenty-six thousand, two hundred twenty-one".