20671326 has 24 divisors (see below), whose sum is σ = 48233640. Its totient is φ = 6360336.

The previous prime is 20671307. The next prime is 20671331. The reversal of 20671326 is 62317602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20671326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43936 + ... + 44403.

It is an arithmetic number, because the mean of its divisors is an integer number (2009735).

Almost surely, 2^20671326 is an apocalyptic number.

20671326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20671326 is an abundant number, since it is smaller than the sum of its proper divisors (27562314).

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

20671326 is a wasteful number, since it uses less digits than its factorization.

20671326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88360 (or 88357 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20671326 is about 4546.5729951250. The cubic root of 20671326 is about 274.4454986504.

Adding to 20671326 its reverse (62317602), we get a palindrome (82988928).

The spelling of 20671326 in words is "twenty million, six hundred seventy-one thousand, three hundred twenty-six".