20027471 has 4 divisors (see below), whose sum is σ = 20568792. Its totient is φ = 19486152.

The previous prime is 20027461. The next prime is 20027507. The reversal of 20027471 is 17472002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17472002 = 2 ⋅8736001.

It is a cyclic number.

It is not a de Polignac number, because 20027471 - 2¹⁴ = 20011087 is a prime.

It is a super-3 number, since 3×20027471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20027401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270605 + ... + 270678.

It is an arithmetic number, because the mean of its divisors is an integer number (5142198).

Almost surely, 2^20027471 is an apocalyptic number.

20027471 is a deficient number, since it is larger than the sum of its proper divisors (541321).

20027471 is an equidigital number, since it uses as much as digits as its factorization.

20027471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541320.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 20027471 is about 4475.2062522302. The cubic root of 20027471 is about 271.5659844120.

Adding to 20027471 its reverse (17472002), we get a palindrome (37499473).

The spelling of 20027471 in words is "twenty million, twenty-seven thousand, four hundred seventy-one".