20214409 has 2 divisors, whose sum is σ = 20214410. Its totient is φ = 20214408.

The previous prime is 20214391. The next prime is 20214413. The reversal of 20214409 is 90441202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 5774409 = 3800^2 + 2403^2 .

It is a cyclic number.

It is not a de Polignac number, because 20214409 - 2¹⁷ = 20083337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20214409.

It is not a weakly prime, because it can be changed into another prime (20214109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10107204 + 10107205.

It is an arithmetic number, because the mean of its divisors is an integer number (10107205).

Almost surely, 2^20214409 is an apocalyptic number.

It is an amenable number.

20214409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20214409 is an equidigital number, since it uses as much as digits as its factorization.

20214409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20214409 is about 4496.0437053036. The cubic root of 20214409 is about 272.4083085163.

The spelling of 20214409 in words is "twenty million, two hundred fourteen thousand, four hundred nine".