20040049 has 2 divisors, whose sum is σ = 20040050. Its totient is φ = 20040048.

The previous prime is 20039993. The next prime is 20040067. The reversal of 20040049 is 94004002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16257024 + 3783025 = 4032^2 + 1945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20040049 is a prime.

It is not a weakly prime, because it can be changed into another prime (20049049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020024 + 10020025.

It is an arithmetic number, because the mean of its divisors is an integer number (10020025).

Almost surely, 2^20040049 is an apocalyptic number.

It is an amenable number.

20040049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040049 is an equidigital number, since it uses as much as digits as its factorization.

20040049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20040049 is about 4476.6113300129. The cubic root of 20040049 is about 271.6228237092.

The spelling of 20040049 in words is "twenty million, forty thousand, forty-nine".