20375274709 has 2 divisors, whose sum is σ = 20375274710. Its totient is φ = 20375274708.

The previous prime is 20375274649. The next prime is 20375274767. The reversal of 20375274709 is 90747257302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19057802500 + 1317472209 = 138050^2 + 36297^2 .

It is a cyclic number.

It is not a de Polignac number, because 20375274709 - 2¹³ = 20375266517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375274779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187637354 + 10187637355.

It is an arithmetic number, because the mean of its divisors is an integer number (10187637355).

Almost surely, 2^20375274709 is an apocalyptic number.

It is an amenable number.

20375274709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375274709 is an equidigital number, since it uses as much as digits as its factorization.

20375274709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 740880, while the sum is 46.

The spelling of 20375274709 in words is "twenty billion, three hundred seventy-five million, two hundred seventy-four thousand, seven hundred nine".