20002671 has 18 divisors (see below), whose sum is σ = 31288608. Its totient is φ = 12308400.

The previous prime is 20002669. The next prime is 20002673. The reversal of 20002671 is 17620002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20002669) and next prime (20002673).

It is not a de Polignac number, because 20002671 - 2¹ = 20002669 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002673) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5055 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (1738256).

Almost surely, 2^20002671 is an apocalyptic number.

20002671 is a deficient number, since it is larger than the sum of its proper divisors (11285937).

20002671 is a wasteful number, since it uses less digits than its factorization.

20002671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13183 (or 13167 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20002671 is about 4472.4345719082. The cubic root of 20002671 is about 271.4538448040.

Adding to 20002671 its reverse (17620002), we get a palindrome (37622673).

The spelling of 20002671 in words is "twenty million, two thousand, six hundred seventy-one".