20212332409 has 2 divisors, whose sum is σ = 20212332410. Its totient is φ = 20212332408.

The previous prime is 20212332383. The next prime is 20212332433. The reversal of 20212332409 is 90423321202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20029325625 + 183006784 = 141525^2 + 13528^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212332409 - 2⁵ = 20212332377 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212332499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106166204 + 10106166205.

It is an arithmetic number, because the mean of its divisors is an integer number (10106166205).

Almost surely, 2^20212332409 is an apocalyptic number.

It is an amenable number.

20212332409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212332409 is an equidigital number, since it uses as much as digits as its factorization.

20212332409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20212332409 in words is "twenty billion, two hundred twelve million, three hundred thirty-two thousand, four hundred nine".