20012770 has 24 divisors (see below), whose sum is σ = 36629532. Its totient is φ = 7872480.

The previous prime is 20012767. The next prime is 20012771. The reversal of 20012770 is 7721002.

It can be written as a sum of positive squares in 2 ways, for example, as 20007729 + 5041 = 4473^2 + 71^2 .

It is not an unprimeable number, because it can be changed into a prime (20012771) 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 11 ways as a sum of consecutive naturals, for example, 50212 + ... + 50608.

Almost surely, 2^20012770 is an apocalyptic number.

20012770 is a deficient number, since it is larger than the sum of its proper divisors (16616762).

20012770 is an equidigital number, since it uses as much as digits as its factorization.

20012770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 20012770 is about 4473.5634565746. The cubic root of 20012770 is about 271.4995212230.

Adding to 20012770 its reverse (7721002), we get a palindrome (27733772).

The spelling of 20012770 in words is "twenty million, twelve thousand, seven hundred seventy".