20051516533 has 2 divisors, whose sum is σ = 20051516534. Its totient is φ = 20051516532.

The previous prime is 20051516509. The next prime is 20051516543. The reversal of 20051516533 is 33561515002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18428877009 + 1622639524 = 135753^2 + 40282^2 .

It is a cyclic number.

It is not a de Polignac number, because 20051516533 - 2⁵ = 20051516501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20051516495 and 20051516504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20051516543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10025758266 + 10025758267.

It is an arithmetic number, because the mean of its divisors is an integer number (10025758267).

Almost surely, 2^20051516533 is an apocalyptic number.

It is an amenable number.

20051516533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20051516533 is an equidigital number, since it uses as much as digits as its factorization.

20051516533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 20051516533 in words is "twenty billion, fifty-one million, five hundred sixteen thousand, five hundred thirty-three".