20323546 has 16 divisors (see below), whose sum is σ = 31062528. Its totient is φ = 9971200.

The previous prime is 20323531. The next prime is 20323547. The reversal of 20323546 is 64532302.

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 20323546.

It is not an unprimeable number, because it can be changed into a prime (20323547) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 31386 + ... + 32026.

It is an arithmetic number, because the mean of its divisors is an integer number (1941408).

Almost surely, 2^20323546 is an apocalyptic number.

20323546 is a deficient number, since it is larger than the sum of its proper divisors (10738982).

20323546 is a wasteful number, since it uses less digits than its factorization.

20323546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20323546 is about 4508.1643714488. The cubic root of 20323546 is about 272.8976703701.

Adding to 20323546 its reverse (64532302), we get a palindrome (84855848).

The spelling of 20323546 in words is "twenty million, three hundred twenty-three thousand, five hundred forty-six".