20769901 has 2 divisors, whose sum is σ = 20769902. Its totient is φ = 20769900.

The previous prime is 20769883. The next prime is 20769923. The reversal of 20769901 is 10996702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 249001 = 4530^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 20769901 - 2⁹ = 20769389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20769941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384950 + 10384951.

It is an arithmetic number, because the mean of its divisors is an integer number (10384951).

Almost surely, 2^20769901 is an apocalyptic number.

It is an amenable number.

20769901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20769901 is an equidigital number, since it uses as much as digits as its factorization.

20769901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20769901 is about 4557.4006846008. The cubic root of 20769901 is about 274.8810548965.

The spelling of 20769901 in words is "twenty million, seven hundred sixty-nine thousand, nine hundred one".