20531326 has 4 divisors (see below), whose sum is σ = 30796992. Its totient is φ = 10265662.

The previous prime is 20531297. The next prime is 20531347. The reversal of 20531326 is 62313502.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20531297 and 20531306.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5132830 + ... + 5132833.

It is an arithmetic number, because the mean of its divisors is an integer number (7699248).

Almost surely, 2^20531326 is an apocalyptic number.

20531326 is a deficient number, since it is larger than the sum of its proper divisors (10265666).

20531326 is a wasteful number, since it uses less digits than its factorization.

20531326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10265665.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20531326 is about 4531.1506264965. The cubic root of 20531326 is about 273.8245186788.

Adding to 20531326 its reverse (62313502), we get a palindrome (82844828).

The spelling of 20531326 in words is "twenty million, five hundred thirty-one thousand, three hundred twenty-six".