20025303421 has 2 divisors, whose sum is σ = 20025303422. Its totient is φ = 20025303420.

The previous prime is 20025303413. The next prime is 20025303439. The reversal of 20025303421 is 12430352002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19491231321 + 534072100 = 139611^2 + 23110^2 .

It is a cyclic number.

It is not a de Polignac number, because 20025303421 - 2³ = 20025303413 is a prime.

It is a super-2 number, since 2×20025303421² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20025303392 and 20025303401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20025303481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10012651710 + 10012651711.

It is an arithmetic number, because the mean of its divisors is an integer number (10012651711).

Almost surely, 2^20025303421 is an apocalyptic number.

It is an amenable number.

20025303421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20025303421 is an equidigital number, since it uses as much as digits as its factorization.

20025303421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20025303421 its reverse (12430352002), we get a palindrome (32455655423).

The spelling of 20025303421 in words is "twenty billion, twenty-five million, three hundred three thousand, four hundred twenty-one".