20344671 has 6 divisors (see below), whose sum is σ = 29386760. Its totient is φ = 13563108.

The previous prime is 20344619. The next prime is 20344679. The reversal of 20344671 is 17644302.

It is not a de Polignac number, because 20344671 - 2⁶ = 20344607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1130251 + ... + 1130268.

Almost surely, 2^20344671 is an apocalyptic number.

20344671 is a deficient number, since it is larger than the sum of its proper divisors (9042089).

20344671 is a wasteful number, since it uses less digits than its factorization.

20344671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260525 (or 2260522 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20344671 is about 4510.5067342816. The cubic root of 20344671 is about 272.9921907358.

Adding to 20344671 its reverse (17644302), we get a palindrome (37988973).

The spelling of 20344671 in words is "twenty million, three hundred forty-four thousand, six hundred seventy-one".