20514561212423 has 2 divisors, whose sum is σ = 20514561212424. Its totient is φ = 20514561212422.

The previous prime is 20514561212401. The next prime is 20514561212429. The reversal of 20514561212423 is 32421216541502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20514561212423 - 2¹² = 20514561208327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20514561212429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257280606211 + 10257280606212.

It is an arithmetic number, because the mean of its divisors is an integer number (10257280606212).

Almost surely, 2^{20514561212423} is an apocalyptic number.

20514561212423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514561212423 is an equidigital number, since it uses as much as digits as its factorization.

20514561212423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 20514561212423 its reverse (32421216541502), we get a palindrome (52935777753925).

The spelling of 20514561212423 in words is "twenty trillion, five hundred fourteen billion, five hundred sixty-one million, two hundred twelve thousand, four hundred twenty-three".