20885701 has 2 divisors, whose sum is σ = 20885702. Its totient is φ = 20885700.

The previous prime is 20885663. The next prime is 20885717. The reversal of 20885701 is 10758802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 1437601 = 4410^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20885701 - 2¹⁵ = 20852933 is a prime.

It is a super-2 number, since 2×20885701² = 872425012522802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20885791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10442850 + 10442851.

It is an arithmetic number, because the mean of its divisors is an integer number (10442851).

Almost surely, 2^20885701 is an apocalyptic number.

It is an amenable number.

20885701 is a deficient number, since it is larger than the sum of its proper divisors (1).

20885701 is an equidigital number, since it uses as much as digits as its factorization.

20885701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 20885701 is about 4570.0876359212. The cubic root of 20885701 is about 275.3909634688.

The spelling of 20885701 in words is "twenty million, eight hundred eighty-five thousand, seven hundred one".