20670361 has 2 divisors, whose sum is σ = 20670362. Its totient is φ = 20670360.

The previous prime is 20670341. The next prime is 20670373. The reversal of 20670361 is 16307602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1485961 = 4380^2 + 1219^2 .

It is a cyclic number.

It is not a de Polignac number, because 20670361 - 2¹⁹ = 20146073 is a prime.

It is not a weakly prime, because it can be changed into another prime (20670311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335180 + 10335181.

It is an arithmetic number, because the mean of its divisors is an integer number (10335181).

Almost surely, 2^20670361 is an apocalyptic number.

It is an amenable number.

20670361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20670361 is an equidigital number, since it uses as much as digits as its factorization.

20670361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20670361 is about 4546.4668699992. The cubic root of 20670361 is about 274.4412279353.

Adding to 20670361 its reverse (16307602), we get a palindrome (36977963).

The spelling of 20670361 in words is "twenty million, six hundred seventy thousand, three hundred sixty-one".