20404502533 has 2 divisors, whose sum is σ = 20404502534. Its totient is φ = 20404502532.

The previous prime is 20404502519. The next prime is 20404502543. The reversal of 20404502533 is 33520540402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18019840644 + 2384661889 = 134238^2 + 48833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20404502533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404502543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202251266 + 10202251267.

It is an arithmetic number, because the mean of its divisors is an integer number (10202251267).

Almost surely, 2^20404502533 is an apocalyptic number.

It is an amenable number.

20404502533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404502533 is an equidigital number, since it uses as much as digits as its factorization.

20404502533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 28.

The spelling of 20404502533 in words is "twenty billion, four hundred four million, five hundred two thousand, five hundred thirty-three".