20053345 has 16 divisors (see below), whose sum is σ = 26408592. Its totient is φ = 14526720.

The previous prime is 20053343. The next prime is 20053357. The reversal of 20053345 is 54335002.

It can be written as a sum of positive squares in 8 ways, for example, as 63504 + 19989841 = 252^2 + 4471^2 .

It is not a de Polignac number, because 20053345 - 2¹ = 20053343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20053343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (1650537).

Almost surely, 2^20053345 is an apocalyptic number.

It is an amenable number.

20053345 is a deficient number, since it is larger than the sum of its proper divisors (6355247).

20053345 is a wasteful number, since it uses less digits than its factorization.

20053345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 20053345 is about 4478.0961356362. The cubic root of 20053345 is about 271.6828817568.

Adding to 20053345 its reverse (54335002), we get a palindrome (74388347).

The spelling of 20053345 in words is "twenty million, fifty-three thousand, three hundred forty-five".