20542250 has 32 divisors (see below), whose sum is σ = 38817792. Its totient is φ = 8139600.

The previous prime is 20542213. The next prime is 20542253. The reversal of 20542250 is 5224502.

It is not an unprimeable number, because it can be changed into a prime (20542253) by changing a digit.

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, 31427 + ... + 32073.

It is an arithmetic number, because the mean of its divisors is an integer number (1213056).

Almost surely, 2^20542250 is an apocalyptic number.

20542250 is a deficient number, since it is larger than the sum of its proper divisors (18275542).

20542250 is a wasteful number, since it uses less digits than its factorization.

20542250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 781 counting only the distinct ones).

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

The square root of 20542250 is about 4532.3558995295. The cubic root of 20542250 is about 273.8730742159.

Adding to 20542250 its reverse (5224502), we get a palindrome (25766752).

The spelling of 20542250 in words is "twenty million, five hundred forty-two thousand, two hundred fifty".