20131021411 has 4 divisors (see below), whose sum is σ = 20131713000. Its totient is φ = 20130329824.

The previous prime is 20131021387. The next prime is 20131021433. The reversal of 20131021411 is 11412013102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20131021411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131021451) 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, 300121 + ... + 361018.

It is an arithmetic number, because the mean of its divisors is an integer number (5032928250).

Almost surely, 2^20131021411 is an apocalyptic number.

20131021411 is a deficient number, since it is larger than the sum of its proper divisors (691589).

20131021411 is an equidigital number, since it uses as much as digits as its factorization.

20131021411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691588.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20131021411 its reverse (11412013102), we get a palindrome (31543034513).

The spelling of 20131021411 in words is "twenty billion, one hundred thirty-one million, twenty-one thousand, four hundred eleven".