20200311 has 6 divisors (see below), whose sum is σ = 29178240. Its totient is φ = 13466868.

The previous prime is 20200309. The next prime is 20200337. The reversal of 20200311 is 11300202.

It is a happy number.

It is not a de Polignac number, because 20200311 - 2¹ = 20200309 is a prime.

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: 2244479 = 20200311 / (2 + 0 + 2 + 0 + 0 + 3 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 20200293 and 20200302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200111) 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, 1122231 + ... + 1122248.

It is an arithmetic number, because the mean of its divisors is an integer number (4863040).

Almost surely, 2^20200311 is an apocalyptic number.

20200311 is a deficient number, since it is larger than the sum of its proper divisors (8977929).

20200311 is a wasteful number, since it uses less digits than its factorization.

20200311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244485 (or 2244482 counting only the distinct ones).

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

The square root of 20200311 is about 4494.4756090116. The cubic root of 20200311 is about 272.3449658205.

Adding to 20200311 its reverse (11300202), we get a palindrome (31500513).

The spelling of 20200311 in words is "twenty million, two hundred thousand, three hundred eleven".