20533413473 has 2 divisors, whose sum is σ = 20533413474. Its totient is φ = 20533413472.

The previous prime is 20533413457. The next prime is 20533413499. The reversal of 20533413473 is 37431433502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15156564544 + 5376848929 = 123112^2 + 73327^2 .

It is a cyclic number.

It is not a de Polignac number, because 20533413473 - 2⁴ = 20533413457 is a prime.

It is not a weakly prime, because it can be changed into another prime (20533413443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266706736 + 10266706737.

It is an arithmetic number, because the mean of its divisors is an integer number (10266706737).

Almost surely, 2^20533413473 is an apocalyptic number.

It is an amenable number.

20533413473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533413473 is an equidigital number, since it uses as much as digits as its factorization.

20533413473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 35.

Adding to 20533413473 its reverse (37431433502), we get a palindrome (57964846975).

The spelling of 20533413473 in words is "twenty billion, five hundred thirty-three million, four hundred thirteen thousand, four hundred seventy-three".