20365901 has 2 divisors, whose sum is σ = 20365902. Its totient is φ = 20365900.

The previous prime is 20365897. The next prime is 20365957. The reversal of 20365901 is 10956302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10569001 + 9796900 = 3251^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 20365901 - 2² = 20365897 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20365991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182950 + 10182951.

It is an arithmetic number, because the mean of its divisors is an integer number (10182951).

Almost surely, 2^20365901 is an apocalyptic number.

It is an amenable number.

20365901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20365901 is an equidigital number, since it uses as much as digits as its factorization.

20365901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20365901 is about 4512.8595147644. The cubic root of 20365901 is about 273.0871150108.

The spelling of 20365901 in words is "twenty million, three hundred sixty-five thousand, nine hundred one".