20656150693 has 2 divisors, whose sum is σ = 20656150694. Its totient is φ = 20656150692.

The previous prime is 20656150651. The next prime is 20656150717. The reversal of 20656150693 is 39605165602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20558397924 + 97752769 = 143382^2 + 9887^2 .

It is a cyclic number.

It is not a de Polignac number, because 20656150693 - 2¹⁷ = 20656019621 is a prime.

It is a super-2 number, since 2×20656150693² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20656150633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10328075346 + 10328075347.

It is an arithmetic number, because the mean of its divisors is an integer number (10328075347).

Almost surely, 2^20656150693 is an apocalyptic number.

It is an amenable number.

20656150693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20656150693 is an equidigital number, since it uses as much as digits as its factorization.

20656150693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 20656150693 in words is "twenty billion, six hundred fifty-six million, one hundred fifty thousand, six hundred ninety-three".