20502146 has 16 divisors (see below), whose sum is σ = 35743680. Its totient is φ = 8637360.

The previous prime is 20502143. The next prime is 20502151. The reversal of 20502146 is 64120502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20502143) 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 7 ways as a sum of consecutive naturals, for example, 11585 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (2233980).

Almost surely, 2^20502146 is an apocalyptic number.

20502146 is a deficient number, since it is larger than the sum of its proper divisors (15241534).

20502146 is a wasteful number, since it uses less digits than its factorization.

20502146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24889.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20502146 is about 4527.9295489219. The cubic root of 20502146 is about 273.6947334621.

Adding to 20502146 its reverse (64120502), we get a palindrome (84622648).

The spelling of 20502146 in words is "twenty million, five hundred two thousand, one hundred forty-six".