20303967533 has 2 divisors, whose sum is σ = 20303967534. Its totient is φ = 20303967532.

The previous prime is 20303967529. The next prime is 20303967539. The reversal of 20303967533 is 33576930302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13474102084 + 6829865449 = 116078^2 + 82643^2 .

It is a cyclic number.

It is not a de Polignac number, because 20303967533 - 2² = 20303967529 is a prime.

It is a super-2 number, since 2×20303967533² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20303967539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151983766 + 10151983767.

It is an arithmetic number, because the mean of its divisors is an integer number (10151983767).

Almost surely, 2^20303967533 is an apocalyptic number.

It is an amenable number.

20303967533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20303967533 is an equidigital number, since it uses as much as digits as its factorization.

20303967533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 41.

The spelling of 20303967533 in words is "twenty billion, three hundred three million, nine hundred sixty-seven thousand, five hundred thirty-three".