20964677 has 2 divisors, whose sum is σ = 20964678. Its totient is φ = 20964676.

The previous prime is 20964673. The next prime is 20964701. The reversal of 20964677 is 77646902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18931201 + 2033476 = 4351^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 20964677 - 2² = 20964673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20964673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10482338 + 10482339.

It is an arithmetic number, because the mean of its divisors is an integer number (10482339).

Almost surely, 2^20964677 is an apocalyptic number.

It is an amenable number.

20964677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20964677 is an equidigital number, since it uses as much as digits as its factorization.

20964677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 20964677 is about 4578.7200176469. The cubic root of 20964677 is about 275.7376427647.

The spelling of 20964677 in words is "twenty million, nine hundred sixty-four thousand, six hundred seventy-seven".