20514953489 has 2 divisors, whose sum is σ = 20514953490. Its totient is φ = 20514953488.

The previous prime is 20514953453. The next prime is 20514953513. The reversal of 20514953489 is 98435941502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13203848464 + 7311105025 = 114908^2 + 85505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20514953489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20514953689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10257476744 + 10257476745.

It is an arithmetic number, because the mean of its divisors is an integer number (10257476745).

Almost surely, 2^20514953489 is an apocalyptic number.

It is an amenable number.

20514953489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20514953489 is an equidigital number, since it uses as much as digits as its factorization.

20514953489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 20514953489 in words is "twenty billion, five hundred fourteen million, nine hundred fifty-three thousand, four hundred eighty-nine".