20335445 has 16 divisors (see below), whose sum is σ = 26432112. Its totient is φ = 14929920.

The previous prime is 20335421. The next prime is 20335463. The reversal of 20335445 is 54453302.

It can be written as a sum of positive squares in 8 ways, for example, as 1343281 + 18992164 = 1159^2 + 4358^2 .

It is not a de Polignac number, because 20335445 - 2²² = 16141141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11735 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (1652007).

Almost surely, 2^20335445 is an apocalyptic number.

It is an amenable number.

20335445 is a deficient number, since it is larger than the sum of its proper divisors (6096667).

20335445 is a wasteful number, since it uses less digits than its factorization.

20335445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 20335445 is about 4509.4838950816. The cubic root of 20335445 is about 272.9509185559.

Adding to 20335445 its reverse (54453302), we get a palindrome (74788747).

The spelling of 20335445 in words is "twenty million, three hundred thirty-five thousand, four hundred forty-five".