20333223409 has 2 divisors, whose sum is σ = 20333223410. Its totient is φ = 20333223408.

The previous prime is 20333223403. The next prime is 20333223467. The reversal of 20333223409 is 90432233302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10582648384 + 9750575025 = 102872^2 + 98745^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333223409 - 2³ = 20333223401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20333223401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166611704 + 10166611705.

It is an arithmetic number, because the mean of its divisors is an integer number (10166611705).

Almost surely, 2^20333223409 is an apocalyptic number.

It is an amenable number.

20333223409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333223409 is an equidigital number, since it uses as much as digits as its factorization.

20333223409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 31.

The spelling of 20333223409 in words is "twenty billion, three hundred thirty-three million, two hundred twenty-three thousand, four hundred nine".