20533420351 has 2 divisors, whose sum is σ = 20533420352. Its totient is φ = 20533420350.

The previous prime is 20533420319. The next prime is 20533420357. The reversal of 20533420351 is 15302433502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20533420351 - 2⁵ = 20533420319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20533420357) 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, 10266710175 + 10266710176.

It is an arithmetic number, because the mean of its divisors is an integer number (10266710176).

Almost surely, 2^20533420351 is an apocalyptic number.

20533420351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533420351 is an equidigital number, since it uses as much as digits as its factorization.

20533420351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 20533420351 its reverse (15302433502), we get a palindrome (35835853853).

The spelling of 20533420351 in words is "twenty billion, five hundred thirty-three million, four hundred twenty thousand, three hundred fifty-one".