20232409 has 2 divisors, whose sum is σ = 20232410. Its totient is φ = 20232408.

The previous prime is 20232391. The next prime is 20232413. The reversal of 20232409 is 90423202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 1570009 = 4320^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20232409 - 2¹¹ = 20230361 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20232409.

It is not a weakly prime, because it can be changed into another prime (20238409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116204 + 10116205.

It is an arithmetic number, because the mean of its divisors is an integer number (10116205).

Almost surely, 2^20232409 is an apocalyptic number.

It is an amenable number.

20232409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20232409 is an equidigital number, since it uses as much as digits as its factorization.

20232409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20232409 is about 4498.0450197836. The cubic root of 20232409 is about 272.4891402119.

The spelling of 20232409 in words is "twenty million, two hundred thirty-two thousand, four hundred nine".