20115446 has 16 divisors (see below), whose sum is σ = 32568144. Its totient is φ = 9262944.

The previous prime is 20115439. The next prime is 20115449. The reversal of 20115446 is 64451102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (2035509).

Almost surely, 2^20115446 is an apocalyptic number.

20115446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20115446 is a deficient number, since it is larger than the sum of its proper divisors (12452698).

20115446 is a wasteful number, since it uses less digits than its factorization.

20115446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20115446 is about 4485.0246376135. The cubic root of 20115446 is about 271.9630410423.

Adding to 20115446 its reverse (64451102), we get a palindrome (84566548).

The spelling of 20115446 in words is "twenty million, one hundred fifteen thousand, four hundred forty-six".