20773081 has 4 divisors (see below), whose sum is σ = 23740672. Its totient is φ = 17805492.

The previous prime is 20773079. The next prime is 20773091. The reversal of 20773081 is 18037702.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 20773081 - 2¹ = 20773079 is a prime.

It is a super-2 number, since 2×20773081² = 863041788465122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20773091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1483785 + ... + 1483798.

It is an arithmetic number, because the mean of its divisors is an integer number (5935168).

Almost surely, 2^20773081 is an apocalyptic number.

It is an amenable number.

20773081 is a deficient number, since it is larger than the sum of its proper divisors (2967591).

20773081 is an equidigital number, since it uses as much as digits as its factorization.

20773081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967590.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 20773081 is about 4557.7495543305. The cubic root of 20773081 is about 274.8950828424.

The spelling of 20773081 in words is "twenty million, seven hundred seventy-three thousand, eighty-one".