20026471 has 2 divisors, whose sum is σ = 20026472. Its totient is φ = 20026470.

The previous prime is 20026469. The next prime is 20026481. The reversal of 20026471 is 17462002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20026471 - 2¹ = 20026469 is a prime.

It is a super-3 number, since 3×20026471³ (a number of 23 digits) contains 333 as substring.

Together with 20026469, it forms a pair of twin primes.

It is equal to p_1272190 and since 20026471 and 1272190 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20026451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013235 + 10013236.

It is an arithmetic number, because the mean of its divisors is an integer number (10013236).

Almost surely, 2^20026471 is an apocalyptic number.

20026471 is a deficient number, since it is larger than the sum of its proper divisors (1).

20026471 is an equidigital number, since it uses as much as digits as its factorization.

20026471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20026471 is about 4475.0945241414. The cubic root of 20026471 is about 271.5614644454.

Adding to 20026471 its reverse (17462002), we get a palindrome (37488473).

The spelling of 20026471 in words is "twenty million, twenty-six thousand, four hundred seventy-one".