20500049 has 2 divisors, whose sum is σ = 20500050. Its totient is φ = 20500048.

The previous prime is 20500033. The next prime is 20500063. The reversal of 20500049 is 94000502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18861649 + 1638400 = 4343^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 20500049 - 2⁴ = 20500033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20500049.

It is not a weakly prime, because it can be changed into another prime (20500019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250024 + 10250025.

It is an arithmetic number, because the mean of its divisors is an integer number (10250025).

Almost surely, 2^20500049 is an apocalyptic number.

It is an amenable number.

20500049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500049 is an equidigital number, since it uses as much as digits as its factorization.

20500049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20500049 is about 4527.6979802103. The cubic root of 20500049 is about 273.6854017979.

The spelling of 20500049 in words is "twenty million, five hundred thousand, forty-nine".