20360551 has 2 divisors, whose sum is σ = 20360552. Its totient is φ = 20360550.

The previous prime is 20360539. The next prime is 20360567. The reversal of 20360551 is 15506302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20360551 - 2⁷ = 20360423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20360531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180275 + 10180276.

It is an arithmetic number, because the mean of its divisors is an integer number (10180276).

Almost surely, 2^20360551 is an apocalyptic number.

20360551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20360551 is an equidigital number, since it uses as much as digits as its factorization.

20360551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20360551 is about 4512.2667252723. The cubic root of 20360551 is about 273.0632001344.

Adding to 20360551 its reverse (15506302), we get a palindrome (35866853).

The spelling of 20360551 in words is "twenty million, three hundred sixty thousand, five hundred fifty-one".