20355050633 has 2 divisors, whose sum is σ = 20355050634. Its totient is φ = 20355050632.

The previous prime is 20355050629. The next prime is 20355050659. The reversal of 20355050633 is 33605055302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20154913024 + 200137609 = 141968^2 + 14147^2 .

It is a cyclic number.

It is not a de Polignac number, because 20355050633 - 2² = 20355050629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20355050633.

It is not a weakly prime, because it can be changed into another prime (20355050663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177525316 + 10177525317.

It is an arithmetic number, because the mean of its divisors is an integer number (10177525317).

Almost surely, 2^20355050633 is an apocalyptic number.

It is an amenable number.

20355050633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20355050633 is an equidigital number, since it uses as much as digits as its factorization.

20355050633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 32.

The spelling of 20355050633 in words is "twenty billion, three hundred fifty-five million, fifty thousand, six hundred thirty-three".