20531322446 has 12 divisors (see below), whose sum is σ = 31117780008. Its totient is φ = 10159820352.

The previous prime is 20531322443. The next prime is 20531322463. The reversal of 20531322446 is 64422313502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531322443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 526706 + ... + 564341.

It is an arithmetic number, because the mean of its divisors is an integer number (2593148334).

Almost surely, 2^20531322446 is an apocalyptic number.

20531322446 is a deficient number, since it is larger than the sum of its proper divisors (10586457562).

20531322446 is an equidigital number, since it uses as much as digits as its factorization.

20531322446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091243 (or 1091146 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 20531322446 its reverse (64422313502), we get a palindrome (84953635948).

The spelling of 20531322446 in words is "twenty billion, five hundred thirty-one million, three hundred twenty-two thousand, four hundred forty-six".