20109770 has 8 divisors (see below), whose sum is σ = 36197604. Its totient is φ = 8043904.

The previous prime is 20109757. The next prime is 20109773. The reversal of 20109770 is 7790102.

It can be written as a sum of positive squares in 2 ways, for example, as 19333609 + 776161 = 4397^2 + 881^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20109773) 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 3 ways as a sum of consecutive naturals, for example, 1005479 + ... + 1005498.

Almost surely, 2^20109770 is an apocalyptic number.

20109770 is a deficient number, since it is larger than the sum of its proper divisors (16087834).

20109770 is a wasteful number, since it uses less digits than its factorization.

20109770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010984.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 20109770 is about 4484.3918205259. The cubic root of 20109770 is about 271.9374585880.

Adding to 20109770 its reverse (7790102), we get a palindrome (27899872).

The spelling of 20109770 in words is "twenty million, one hundred nine thousand, seven hundred seventy".