20362353421 has 2 divisors, whose sum is σ = 20362353422. Its totient is φ = 20362353420.

The previous prime is 20362353383. The next prime is 20362353467. The reversal of 20362353421 is 12435326302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13738184100 + 6624169321 = 117210^2 + 81389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20362353421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20362353821) 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, 10181176710 + 10181176711.

It is an arithmetic number, because the mean of its divisors is an integer number (10181176711).

Almost surely, 2^20362353421 is an apocalyptic number.

It is an amenable number.

20362353421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20362353421 is an equidigital number, since it uses as much as digits as its factorization.

20362353421 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20362353421 its reverse (12435326302), we get a palindrome (32797679723).

The spelling of 20362353421 in words is "twenty billion, three hundred sixty-two million, three hundred fifty-three thousand, four hundred twenty-one".