20205070 has 8 divisors (see below), whose sum is σ = 36369144. Its totient is φ = 8082024.

The previous prime is 20205041. The next prime is 20205077. The reversal of 20205070 is 7050202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205077) 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 3 ways as a sum of consecutive naturals, for example, 1010244 + ... + 1010263.

It is an arithmetic number, because the mean of its divisors is an integer number (4546143).

Almost surely, 2^20205070 is an apocalyptic number.

20205070 is a deficient number, since it is larger than the sum of its proper divisors (16164074).

20205070 is a wasteful number, since it uses less digits than its factorization.

20205070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020514.

The product of its (nonzero) digits is 140, while the sum is 16.

The square root of 20205070 is about 4495.0050055589. The cubic root of 20205070 is about 272.3663514306.

Adding to 20205070 its reverse (7050202), we get a palindrome (27255272).

The spelling of 20205070 in words is "twenty million, two hundred five thousand, seventy".