20671376 has 40 divisors (see below), whose sum is σ = 44369184. Its totient is φ = 9250560.

The previous prime is 20671361. The next prime is 20671381. The reversal of 20671376 is 67317602.

It is an unprimeable number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10916 + ... + 12668.

Almost surely, 2^20671376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20671376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22184592).

20671376 is an abundant number, since it is smaller than the sum of its proper divisors (23697808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20671376 is a wasteful number, since it uses less digits than its factorization.

20671376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20671376 is about 4546.5784937687. The cubic root of 20671376 is about 274.4457199273.

Adding to 20671376 its reverse (67317602), we get a palindrome (87988978).

It can be divided in two parts, 2067 and 1376, that added together give a palindrome (3443).

The spelling of 20671376 in words is "twenty million, six hundred seventy-one thousand, three hundred seventy-six".