20522303025421 has 8 divisors (see below), whose sum is σ = 21756357035640. Its totient is φ = 19291233427968.

The previous prime is 20522303025379. The next prime is 20522303025439. The reversal of 20522303025421 is 12452030322502.

It can be written as a sum of positive squares in 4 ways, for example, as 5834905958025 + 14687397067396 = 2415555^2 + 3832414^2 .

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 20522303025421 - 2¹⁷ = 20522302894349 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 (20522303025461) 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, 746089026 + ... + 746116531.

It is an arithmetic number, because the mean of its divisors is an integer number (2719544629455).

Almost surely, 2^{20522303025421} is an apocalyptic number.

It is an amenable number.

20522303025421 is a deficient number, since it is larger than the sum of its proper divisors (1234054010219).

20522303025421 is a wasteful number, since it uses less digits than its factorization.

20522303025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492206383.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20522303025421 its reverse (12452030322502), we get a palindrome (32974333347923).

The spelling of 20522303025421 in words is "twenty trillion, five hundred twenty-two billion, three hundred three million, twenty-five thousand, four hundred twenty-one".