20411331 has 8 divisors (see below), whose sum is σ = 28153680. Its totient is φ = 13138272.

The previous prime is 20411329. The next prime is 20411333. The reversal of 20411331 is 13311402.

It is an interprime number because it is at equal distance from previous prime (20411329) and next prime (20411333).

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

It is not a de Polignac number, because 20411331 - 2¹ = 20411329 is a prime.

It is a super-2 number, since 2×20411331² = 833244866383122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20411331.

It is not an unprimeable number, because it can be changed into a prime (20411333) 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, 117220 + ... + 117393.

It is an arithmetic number, because the mean of its divisors is an integer number (3519210).

Almost surely, 2^20411331 is an apocalyptic number.

20411331 is a deficient number, since it is larger than the sum of its proper divisors (7742349).

20411331 is a wasteful number, since it uses less digits than its factorization.

20411331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234645.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20411331 is about 4517.8901049052. The cubic root of 20411331 is about 273.2900217248.

Adding to 20411331 its reverse (13311402), we get a palindrome (33722733).

The spelling of 20411331 in words is "twenty million, four hundred eleven thousand, three hundred thirty-one".