20090366 has 4 divisors (see below), whose sum is σ = 30135552. Its totient is φ = 10045182.

The previous prime is 20090363. The next prime is 20090377. The reversal of 20090366 is 66309002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66309002 = 2 ⋅33154501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20090363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5022590 + ... + 5022593.

It is an arithmetic number, because the mean of its divisors is an integer number (7533888).

Almost surely, 2^20090366 is an apocalyptic number.

20090366 is a deficient number, since it is larger than the sum of its proper divisors (10045186).

20090366 is a wasteful number, since it uses less digits than its factorization.

20090366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10045185.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20090366 is about 4482.2277943005. The cubic root of 20090366 is about 271.8499659162.

Adding to 20090366 its reverse (66309002), we get a palindrome (86399368).

The spelling of 20090366 in words is "twenty million, ninety thousand, three hundred sixty-six".