20301409 has 2 divisors, whose sum is σ = 20301410. Its totient is φ = 20301408.

The previous prime is 20301401. The next prime is 20301517. The reversal of 20301409 is 90410302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 78400 = 4497^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 20301409 - 2³ = 20301401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20301401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10150704 + 10150705.

It is an arithmetic number, because the mean of its divisors is an integer number (10150705).

Almost surely, 2^20301409 is an apocalyptic number.

It is an amenable number.

20301409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20301409 is an equidigital number, since it uses as much as digits as its factorization.

20301409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20301409 is about 4505.7084903487. The cubic root of 20301409 is about 272.7985516689.

The spelling of 20301409 in words is "twenty million, three hundred one thousand, four hundred nine".