20302133021 has 2 divisors, whose sum is σ = 20302133022. Its totient is φ = 20302133020.

The previous prime is 20302133017. The next prime is 20302133069. The reversal of 20302133021 is 12033120302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12794776996 + 7507356025 = 113114^2 + 86645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302133021 - 2² = 20302133017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302133011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151066510 + 10151066511.

It is an arithmetic number, because the mean of its divisors is an integer number (10151066511).

Almost surely, 2^20302133021 is an apocalyptic number.

It is an amenable number.

20302133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302133021 is an equidigital number, since it uses as much as digits as its factorization.

20302133021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20302133021 its reverse (12033120302), we get a palindrome (32335253323).

The spelling of 20302133021 in words is "twenty billion, three hundred two million, one hundred thirty-three thousand, twenty-one".