20577533701 has 2 divisors, whose sum is σ = 20577533702. Its totient is φ = 20577533700.

The previous prime is 20577533689. The next prime is 20577533707. The reversal of 20577533701 is 10733577502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18076533601 + 2501000100 = 134449^2 + 50010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20577533701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20577533707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10288766850 + 10288766851.

It is an arithmetic number, because the mean of its divisors is an integer number (10288766851).

Almost surely, 2^20577533701 is an apocalyptic number.

It is an amenable number.

20577533701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20577533701 is an equidigital number, since it uses as much as digits as its factorization.

20577533701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154350, while the sum is 40.

The spelling of 20577533701 in words is "twenty billion, five hundred seventy-seven million, five hundred thirty-three thousand, seven hundred one".