20772601 has 2 divisors, whose sum is σ = 20772602. Its totient is φ = 20772600.

The previous prime is 20772599. The next prime is 20772607. The reversal of 20772601 is 10627702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 6370576 = 3795^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 20772601 - 2¹ = 20772599 is a prime.

Together with 20772599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20772607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386300 + 10386301.

It is an arithmetic number, because the mean of its divisors is an integer number (10386301).

Almost surely, 2^20772601 is an apocalyptic number.

It is an amenable number.

20772601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20772601 is an equidigital number, since it uses as much as digits as its factorization.

20772601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20772601 is about 4557.6968964599. The cubic root of 20772601 is about 274.8929655084.

The spelling of 20772601 in words is "twenty million, seven hundred seventy-two thousand, six hundred one".