20202545 has 48 divisors (see below), whose sum is σ = 29707776. Its totient is φ = 13056000.

The previous prime is 20202517. The next prime is 20202557. The reversal of 20202545 is 54520202.

20202545 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 20202545 - 2¹² = 20198449 is a prime.

It is a super-3 number, since 3×20202545³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 492725 + ... + 492765.

It is an arithmetic number, because the mean of its divisors is an integer number (618912).

Almost surely, 2^20202545 is an apocalyptic number.

It is an amenable number.

20202545 is a deficient number, since it is larger than the sum of its proper divisors (9505231).

20202545 is a wasteful number, since it uses less digits than its factorization.

20202545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20202545 is about 4494.7241294656. The cubic root of 20202545 is about 272.3550052076.

Adding to 20202545 its reverse (54520202), we get a palindrome (74722747).

The spelling of 20202545 in words is "twenty million, two hundred two thousand, five hundred forty-five".