20531276 has 12 divisors (see below), whose sum is σ = 35979720. Its totient is φ = 10251360.

The previous prime is 20531243. The next prime is 20531297. The reversal of 20531276 is 67213502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 6408.

It is an arithmetic number, because the mean of its divisors is an integer number (2998310).

Almost surely, 2^20531276 is an apocalyptic number.

It is an amenable number.

20531276 is a deficient number, since it is larger than the sum of its proper divisors (15448444).

20531276 is a wasteful number, since it uses less digits than its factorization.

20531276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144 (or 7142 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20531276 is about 4531.1451091308. The cubic root of 20531276 is about 273.8242963967.

Adding to 20531276 its reverse (67213502), we get a palindrome (87744778).

The spelling of 20531276 in words is "twenty million, five hundred thirty-one thousand, two hundred seventy-six".