20514641501 has 2 divisors, whose sum is σ = 20514641502. Its totient is φ = 20514641500.

The previous prime is 20514641473. The next prime is 20514641513. The reversal of 20514641501 is 10514641502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956646276 + 9557995225 = 104674^2 + 97765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20514641501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20514641701) 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, 10257320750 + 10257320751.

It is an arithmetic number, because the mean of its divisors is an integer number (10257320751).

Almost surely, 2^20514641501 is an apocalyptic number.

It is an amenable number.

20514641501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514641501 is an equidigital number, since it uses as much as digits as its factorization.

20514641501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

Subtracting from 20514641501 its reverse (10514641502), we obtain a palindrome (9999999999).

The spelling of 20514641501 in words is "twenty billion, five hundred fourteen million, six hundred forty-one thousand, five hundred one".