20325556 has 12 divisors (see below), whose sum is σ = 35603680. Its totient is φ = 10153080.

The previous prime is 20325533. The next prime is 20325581. The reversal of 20325556 is 65552302.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4465 + ... + 7783.

Almost surely, 2^20325556 is an apocalyptic number.

It is an amenable number.

20325556 is a deficient number, since it is larger than the sum of its proper divisors (15278124).

20325556 is a wasteful number, since it uses less digits than its factorization.

20325556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854 (or 4852 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 20325556 is about 4508.3872948095. The cubic root of 20325556 is about 272.9066666059.

Adding to 20325556 its reverse (65552302), we get a palindrome (85877858).

The spelling of 20325556 in words is "twenty million, three hundred twenty-five thousand, five hundred fifty-six".