20863061 has 4 divisors (see below), whose sum is σ = 20872224. Its totient is φ = 20853900.

The previous prime is 20863039. The next prime is 20863067. The reversal of 20863061 is 16036802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20863061 - 2⁶ = 20862997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20863061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863067) 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 in 3 ways as a sum of consecutive naturals, for example, 1766 + ... + 6696.

It is an arithmetic number, because the mean of its divisors is an integer number (5218056).

Almost surely, 2^20863061 is an apocalyptic number.

It is an amenable number.

20863061 is a deficient number, since it is larger than the sum of its proper divisors (9163).

20863061 is an equidigital number, since it uses as much as digits as its factorization.

20863061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20863061 is about 4567.6099877288. The cubic root of 20863061 is about 275.2914199961.

Adding to 20863061 its reverse (16036802), we get a palindrome (36899863).

The spelling of 20863061 in words is "twenty million, eight hundred sixty-three thousand, sixty-one".