20432350152421 has 2 divisors, whose sum is σ = 20432350152422. Its totient is φ = 20432350152420.

The previous prime is 20432350152419. The next prime is 20432350152437. The reversal of 20432350152421 is 12425105323402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15852382065025 + 4579968087396 = 3981505^2 + 2140086^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432350152421 - 2¹ = 20432350152419 is a prime.

It is a super-2 number, since 2×20432350152421² (a number of 27 digits) contains 22 as substring.

Together with 20432350152419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432350152481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216175076210 + 10216175076211.

It is an arithmetic number, because the mean of its divisors is an integer number (10216175076211).

Almost surely, 2^{20432350152421} is an apocalyptic number.

It is an amenable number.

20432350152421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432350152421 is an equidigital number, since it uses as much as digits as its factorization.

20432350152421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 20432350152421 its reverse (12425105323402), we get a palindrome (32857455475823).

The spelling of 20432350152421 in words is "twenty trillion, four hundred thirty-two billion, three hundred fifty million, one hundred fifty-two thousand, four hundred twenty-one".