20109086 has 4 divisors (see below), whose sum is σ = 30163632. Its totient is φ = 10054542.

The previous prime is 20109073. The next prime is 20109109. The reversal of 20109086 is 68090102.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×20109086⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027270 + ... + 5027273.

It is an arithmetic number, because the mean of its divisors is an integer number (7540908).

Almost surely, 2^20109086 is an apocalyptic number.

20109086 is a deficient number, since it is larger than the sum of its proper divisors (10054546).

20109086 is a wasteful number, since it uses less digits than its factorization.

20109086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054545.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 20109086 is about 4484.3155553551. The cubic root of 20109086 is about 271.9343753879.

Adding to 20109086 its reverse (68090102), we get a palindrome (88199188).

The spelling of 20109086 in words is "twenty million, one hundred nine thousand, eighty-six".