20761693 has 2 divisors, whose sum is σ = 20761694. Its totient is φ = 20761692.

The previous prime is 20761669. The next prime is 20761717. The reversal of 20761693 is 39616702.

It is a balanced prime because it is at equal distance from previous prime (20761669) and next prime (20761717).

It can be written as a sum of positive squares in only one way, i.e., 13155129 + 7606564 = 3627^2 + 2758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20761693 is a prime.

It is the 4557-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20761613) by changing a digit.

It is a nontrivial repunit in base 4556.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380846 + 10380847.

It is an arithmetic number, because the mean of its divisors is an integer number (10380847).

Almost surely, 2^20761693 is an apocalyptic number.

It is an amenable number.

20761693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20761693 is an equidigital number, since it uses as much as digits as its factorization.

20761693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20761693 is about 4556.5000823000. The cubic root of 20761693 is about 274.8448402964.

The spelling of 20761693 in words is "twenty million, seven hundred sixty-one thousand, six hundred ninety-three".