20203011 has 6 divisors (see below), whose sum is σ = 29182140. Its totient is φ = 13468668.

The previous prime is 20203003. The next prime is 20203049. The reversal of 20203011 is 11030202.

It is a happy number.

It is not a de Polignac number, because 20203011 - 2³ = 20203003 is a prime.

It is a super-2 number, since 2×20203011² = 816323306932242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2244779 = 20203011 / (2 + 0 + 2 + 0 + 3 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 20202984 and 20203002.

It is not an unprimeable number, because it can be changed into a prime (20203411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122381 + ... + 1122398.

It is an arithmetic number, because the mean of its divisors is an integer number (4863690).

Almost surely, 2^20203011 is an apocalyptic number.

20203011 is a deficient number, since it is larger than the sum of its proper divisors (8979129).

20203011 is a wasteful number, since it uses less digits than its factorization.

20203011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244785 (or 2244782 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20203011 is about 4494.7759677207. The cubic root of 20203011 is about 272.3570992748.

Adding to 20203011 its reverse (11030202), we get a palindrome (31233213).

The spelling of 20203011 in words is "twenty million, two hundred three thousand, eleven".