20383361 has 2 divisors, whose sum is σ = 20383362. Its totient is φ = 20383360.

The previous prime is 20383351. The next prime is 20383367. The reversal of 20383361 is 16338302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19492225 + 891136 = 4415^2 + 944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20383361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20383361.

It is not a weakly prime, because it can be changed into another prime (20383367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191680 + 10191681.

It is an arithmetic number, because the mean of its divisors is an integer number (10191681).

Almost surely, 2^20383361 is an apocalyptic number.

It is an amenable number.

20383361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20383361 is an equidigital number, since it uses as much as digits as its factorization.

20383361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20383361 is about 4514.7935722467. The cubic root of 20383361 is about 273.1651333136.

The spelling of 20383361 in words is "twenty million, three hundred eighty-three thousand, three hundred sixty-one".