20238228924421 has 2 divisors, whose sum is σ = 20238228924422. Its totient is φ = 20238228924420.

The previous prime is 20238228924383. The next prime is 20238228924451. The reversal of 20238228924421 is 12442982283202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15205991064196 + 5032237860225 = 3899486^2 + 2243265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238228924421 - 2⁷ = 20238228924293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20238228924451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10119114462210 + 10119114462211.

It is an arithmetic number, because the mean of its divisors is an integer number (10119114462211).

Almost surely, 2^{20238228924421} is an apocalyptic number.

It is an amenable number.

20238228924421 is a deficient number, since it is larger than the sum of its proper divisors (1).

20238228924421 is an equidigital number, since it uses as much as digits as its factorization.

20238228924421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1769472, while the sum is 49.

The spelling of 20238228924421 in words is "twenty trillion, two hundred thirty-eight billion, two hundred twenty-eight million, nine hundred twenty-four thousand, four hundred twenty-one".