20271451 has 2 divisors, whose sum is σ = 20271452. Its totient is φ = 20271450.

The previous prime is 20271421. The next prime is 20271469. The reversal of 20271451 is 15417202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20271451 - 2⁷ = 20271323 is a prime.

It is not a weakly prime, because it can be changed into another prime (20271401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135725 + 10135726.

It is an arithmetic number, because the mean of its divisors is an integer number (10135726).

Almost surely, 2^20271451 is an apocalyptic number.

20271451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20271451 is an equidigital number, since it uses as much as digits as its factorization.

20271451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20271451 is about 4502.3828135777. The cubic root of 20271451 is about 272.6642995379.

Adding to 20271451 its reverse (15417202), we get a palindrome (35688653).

The spelling of 20271451 in words is "twenty million, two hundred seventy-one thousand, four hundred fifty-one".