20545122371 has 2 divisors, whose sum is σ = 20545122372. Its totient is φ = 20545122370.

The previous prime is 20545122343. The next prime is 20545122419. The reversal of 20545122371 is 17322154502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20545122371 - 2³⁴ = 3365253187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20545122341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272561185 + 10272561186.

It is an arithmetic number, because the mean of its divisors is an integer number (10272561186).

Almost surely, 2^20545122371 is an apocalyptic number.

20545122371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545122371 is an equidigital number, since it uses as much as digits as its factorization.

20545122371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 20545122371 its reverse (17322154502), we get a palindrome (37867276873).

The spelling of 20545122371 in words is "twenty billion, five hundred forty-five million, one hundred twenty-two thousand, three hundred seventy-one".