20411220331 has 4 divisors (see below), whose sum is σ = 20412304632. Its totient is φ = 20410136032.

The previous prime is 20411220299. The next prime is 20411220377. The reversal of 20411220331 is 13302211402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20411220331 - 2⁵ = 20411220299 is a prime.

It is a super-2 number, since 2×20411220331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20411220299 and 20411220308.

It is not an unprimeable number, because it can be changed into a prime (20411220131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513406 + ... + 551731.

It is an arithmetic number, because the mean of its divisors is an integer number (5103076158).

Almost surely, 2^20411220331 is an apocalyptic number.

20411220331 is a deficient number, since it is larger than the sum of its proper divisors (1084301).

20411220331 is a wasteful number, since it uses less digits than its factorization.

20411220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084300.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20411220331 its reverse (13302211402), we get a palindrome (33713431733).

The spelling of 20411220331 in words is "twenty billion, four hundred eleven million, two hundred twenty thousand, three hundred thirty-one".