20242545 has 16 divisors (see below), whose sum is σ = 32920512. Its totient is φ = 10618560.

The previous prime is 20242511. The next prime is 20242549. The reversal of 20242545 is 54524202.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20242545 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20242549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10147 + ... + 11976.

It is an arithmetic number, because the mean of its divisors is an integer number (2057532).

Almost surely, 2^20242545 is an apocalyptic number.

It is an amenable number.

20242545 is a deficient number, since it is larger than the sum of its proper divisors (12677967).

20242545 is a wasteful number, since it uses less digits than its factorization.

20242545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22192.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20242545 is about 4499.1715904153. The cubic root of 20242545 is about 272.5346363403.

Adding to 20242545 its reverse (54524202), we get a palindrome (74766747).

The spelling of 20242545 in words is "twenty million, two hundred forty-two thousand, five hundred forty-five".