20914769 has 2 divisors, whose sum is σ = 20914770. Its totient is φ = 20914768.

The previous prime is 20914759. The next prime is 20914783. The reversal of 20914769 is 96741902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20367169 + 547600 = 4513^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 20914769 - 2⁴ = 20914753 is a prime.

It is a super-2 number, since 2×20914769² = 874855124646722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20914759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10457384 + 10457385.

It is an arithmetic number, because the mean of its divisors is an integer number (10457385).

Almost surely, 2^20914769 is an apocalyptic number.

It is an amenable number.

20914769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20914769 is an equidigital number, since it uses as much as digits as its factorization.

20914769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20914769 is about 4573.2667755118. The cubic root of 20914769 is about 275.5186641330.

The spelling of 20914769 in words is "twenty million, nine hundred fourteen thousand, seven hundred sixty-nine".