20213520233 has 2 divisors, whose sum is σ = 20213520234. Its totient is φ = 20213520232.

The previous prime is 20213520073. The next prime is 20213520269. The reversal of 20213520233 is 33202531202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10528401664 + 9685118569 = 102608^2 + 98413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213520233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213520199 and 20213520208.

It is not a weakly prime, because it can be changed into another prime (20213550233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106760116 + 10106760117.

It is an arithmetic number, because the mean of its divisors is an integer number (10106760117).

Almost surely, 2^20213520233 is an apocalyptic number.

It is an amenable number.

20213520233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213520233 is an equidigital number, since it uses as much as digits as its factorization.

20213520233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The spelling of 20213520233 in words is "twenty billion, two hundred thirteen million, five hundred twenty thousand, two hundred thirty-three".