20041019077 has 2 divisors, whose sum is σ = 20041019078. Its totient is φ = 20041019076.

The previous prime is 20041019059. The next prime is 20041019081. The reversal of 20041019077 is 77091014002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18093209121 + 1947809956 = 134511^2 + 44134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20041019077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20041019087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020509538 + 10020509539.

It is an arithmetic number, because the mean of its divisors is an integer number (10020509539).

Almost surely, 2^20041019077 is an apocalyptic number.

It is an amenable number.

20041019077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20041019077 is an equidigital number, since it uses as much as digits as its factorization.

20041019077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 20041019077 in words is "twenty billion, forty-one million, nineteen thousand, seventy-seven".