20545340351 has 2 divisors, whose sum is σ = 20545340352. Its totient is φ = 20545340350.

The previous prime is 20545340297. The next prime is 20545340393. The reversal of 20545340351 is 15304354502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20545340351 - 2⁶ = 20545340287 is a prime.

It is a super-2 number, since 2×20545340351² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20545340251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272670175 + 10272670176.

It is an arithmetic number, because the mean of its divisors is an integer number (10272670176).

Almost surely, 2^20545340351 is an apocalyptic number.

20545340351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545340351 is an equidigital number, since it uses as much as digits as its factorization.

20545340351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 20545340351 its reverse (15304354502), we get a palindrome (35849694853).

The spelling of 20545340351 in words is "twenty billion, five hundred forty-five million, three hundred forty thousand, three hundred fifty-one".