20103290 has 8 divisors (see below), whose sum is σ = 36185940. Its totient is φ = 8041312.

The previous prime is 20103289. The next prime is 20103301. The reversal of 20103290 is 9230102.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 3301489 = 4099^2 + 1817^2 .

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

It is an unprimeable number.

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, 1005155 + ... + 1005174.

Almost surely, 2^20103290 is an apocalyptic number.

20103290 is a deficient number, since it is larger than the sum of its proper divisors (16082650).

20103290 is a wasteful number, since it uses less digits than its factorization.

20103290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010336.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20103290 is about 4483.6692563123. The cubic root of 20103290 is about 271.9082465178.

Adding to 20103290 its reverse (9230102), we get a palindrome (29333392).

The spelling of 20103290 in words is "twenty million, one hundred three thousand, two hundred ninety".