20706352061 has 2 divisors, whose sum is σ = 20706352062. Its totient is φ = 20706352060.

The previous prime is 20706352039. The next prime is 20706352081. The reversal of 20706352061 is 16025360702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20367571225 + 338780836 = 142715^2 + 18406^2 .

It is a cyclic number.

It is not a de Polignac number, because 20706352061 - 2¹⁴ = 20706335677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20706352081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353176030 + 10353176031.

It is an arithmetic number, because the mean of its divisors is an integer number (10353176031).

Almost surely, 2^20706352061 is an apocalyptic number.

It is an amenable number.

20706352061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20706352061 is an equidigital number, since it uses as much as digits as its factorization.

20706352061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20706352061 in words is "twenty billion, seven hundred six million, three hundred fifty-two thousand, sixty-one".