20061726397 has 2 divisors, whose sum is σ = 20061726398. Its totient is φ = 20061726396.

The previous prime is 20061726361. The next prime is 20061726437. The reversal of 20061726397 is 79362716002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19304045721 + 757680676 = 138939^2 + 27526^2 .

It is a cyclic number.

It is not a de Polignac number, because 20061726397 - 2¹⁵ = 20061693629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20061720397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030863198 + 10030863199.

It is an arithmetic number, because the mean of its divisors is an integer number (10030863199).

Almost surely, 2^20061726397 is an apocalyptic number.

It is an amenable number.

20061726397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061726397 is an equidigital number, since it uses as much as digits as its factorization.

20061726397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 20061726397 in words is "twenty billion, sixty-one million, seven hundred twenty-six thousand, three hundred ninety-seven".