20039770 has 16 divisors (see below), whose sum is σ = 38193768. Its totient is φ = 7544320.

The previous prime is 20039743. The next prime is 20039771. The reversal of 20039770 is 7793002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20007729 + 32041 = 4473^2 + 179^2 .

It is not an unprimeable number, because it can be changed into a prime (20039771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58771 + ... + 59110.

Almost surely, 2^20039770 is an apocalyptic number.

20039770 is a deficient number, since it is larger than the sum of its proper divisors (18153998).

20039770 is a wasteful number, since it uses less digits than its factorization.

20039770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117905.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 20039770 is about 4476.5801679407. The cubic root of 20039770 is about 271.6215631813.

The spelling of 20039770 in words is "twenty million, thirty-nine thousand, seven hundred seventy".