20200007761909 has 2 divisors, whose sum is σ = 20200007761910. Its totient is φ = 20200007761908.

The previous prime is 20200007761889. The next prime is 20200007761957. The reversal of 20200007761909 is 90916770000202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13894233885009 + 6305773876900 = 3727497^2 + 2511130^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200007761909 - 2⁵ = 20200007761877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20200007711909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100003880954 + 10100003880955.

It is an arithmetic number, because the mean of its divisors is an integer number (10100003880955).

Almost surely, 2^{20200007761909} is an apocalyptic number.

It is an amenable number.

20200007761909 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200007761909 is an equidigital number, since it uses as much as digits as its factorization.

20200007761909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 20200007761909 in words is "twenty trillion, two hundred billion, seven million, seven hundred sixty-one thousand, nine hundred nine".