20500048 has 10 divisors (see below), whose sum is σ = 39718874. Its totient is φ = 10250016.

The previous prime is 20500033. The next prime is 20500049. The reversal of 20500048 is 84000502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 501264 = 4472^2 + 708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20499998 and 20500034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500049) 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 as a sum of consecutive naturals, namely, 640611 + ... + 640642.

Almost surely, 2^20500048 is an apocalyptic number.

It is an amenable number.

20500048 is a deficient number, since it is larger than the sum of its proper divisors (19218826).

20500048 is a wasteful number, since it uses less digits than its factorization.

20500048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281261 (or 1281255 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20500048 is about 4527.6978697789. The cubic root of 20500048 is about 273.6853973477.

The spelling of 20500048 in words is "twenty million, five hundred thousand, forty-eight".