20360491 has 2 divisors, whose sum is σ = 20360492. Its totient is φ = 20360490.

The previous prime is 20360479. The next prime is 20360507. The reversal of 20360491 is 19406302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20360491 - 2⁷ = 20360363 is a prime.

It is a super-2 number, since 2×20360491² = 829099187522162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20360891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180245 + 10180246.

It is an arithmetic number, because the mean of its divisors is an integer number (10180246).

Almost surely, 2^20360491 is an apocalyptic number.

20360491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20360491 is an equidigital number, since it uses as much as digits as its factorization.

20360491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20360491 is about 4512.2600767243. The cubic root of 20360491 is about 273.0629319064.

Adding to 20360491 its reverse (19406302), we get a palindrome (39766793).

The spelling of 20360491 in words is "twenty million, three hundred sixty thousand, four hundred ninety-one".