20803190 has 16 divisors (see below), whose sum is σ = 37672992. Its totient is φ = 8270784.

The previous prime is 20803183. The next prime is 20803199. The reversal of 20803190 is 9130802.

It is a super-2 number, since 2×20803190² = 865545428352200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4559 + ... + 7898.

It is an arithmetic number, because the mean of its divisors is an integer number (2354562).

Almost surely, 2^20803190 is an apocalyptic number.

20803190 is a deficient number, since it is larger than the sum of its proper divisors (16869802).

20803190 is a wasteful number, since it uses less digits than its factorization.

20803190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12631.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20803190 is about 4561.0514138738. The cubic root of 20803190 is about 275.0278318939.

Adding to 20803190 its reverse (9130802), we get a palindrome (29933992).

The spelling of 20803190 in words is "twenty million, eight hundred three thousand, one hundred ninety".