20758970 has 16 divisors (see below), whose sum is σ = 37753128. Its totient is φ = 8217600.

The previous prime is 20758931. The next prime is 20758979. The reversal of 20758970 is 7985702.

It can be written as a sum of positive squares in 4 ways, for example, as 13300609 + 7458361 = 3647^2 + 2731^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20758979) 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 7 ways as a sum of consecutive naturals, for example, 9731 + ... + 11670.

Almost surely, 2^20758970 is an apocalyptic number.

20758970 is a deficient number, since it is larger than the sum of its proper divisors (16994158).

20758970 is a wasteful number, since it uses less digits than its factorization.

20758970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21505.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 20758970 is about 4556.2012686009. The cubic root of 20758970 is about 274.8328240120.

The spelling of 20758970 in words is "twenty million, seven hundred fifty-eight thousand, nine hundred seventy".