20352333102421 has 2 divisors, whose sum is σ = 20352333102422. Its totient is φ = 20352333102420.

The previous prime is 20352333102359. The next prime is 20352333102443. The reversal of 20352333102421 is 12420133325302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10448157634321 + 9904175468100 = 3232361^2 + 3147090^2 .

It is a cyclic number.

It is not a de Polignac number, because 20352333102421 - 2⁷ = 20352333102293 is a prime.

It is a super-3 number, since 3×20352333102421³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20352333102461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176166551210 + 10176166551211.

It is an arithmetic number, because the mean of its divisors is an integer number (10176166551211).

Almost surely, 2^{20352333102421} is an apocalyptic number.

It is an amenable number.

20352333102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20352333102421 is an equidigital number, since it uses as much as digits as its factorization.

20352333102421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 20352333102421 its reverse (12420133325302), we get a palindrome (32772466427723).

The spelling of 20352333102421 in words is "twenty trillion, three hundred fifty-two billion, three hundred thirty-three million, one hundred two thousand, four hundred twenty-one".