20450351 has 2 divisors, whose sum is σ = 20450352. Its totient is φ = 20450350.

The previous prime is 20450329. The next prime is 20450357. The reversal of 20450351 is 15305402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20450351 - 2¹⁰ = 20449327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20450357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225175 + 10225176.

It is an arithmetic number, because the mean of its divisors is an integer number (10225176).

Almost surely, 2^20450351 is an apocalyptic number.

20450351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20450351 is an equidigital number, since it uses as much as digits as its factorization.

20450351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20450351 is about 4522.2064304939. The cubic root of 20450351 is about 273.4640588581.

Adding to 20450351 its reverse (15305402), we get a palindrome (35755753).

The spelling of 20450351 in words is "twenty million, four hundred fifty thousand, three hundred fifty-one".