20131011 has 20 divisors (see below), whose sum is σ = 30282912. Its totient is φ = 13326768.

The previous prime is 20130983. The next prime is 20131019. The reversal of 20131011 is 11013102.

It is not a de Polignac number, because 20131011 - 2¹³ = 20122819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20130984 and 20131002.

It is not an unprimeable number, because it can be changed into a prime (20131019) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11926 + ... + 13508.

Almost surely, 2^20131011 is an apocalyptic number.

20131011 is a deficient number, since it is larger than the sum of its proper divisors (10151901).

20131011 is a wasteful number, since it uses less digits than its factorization.

20131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 20131011 is about 4486.7595210798. The cubic root of 20131011 is about 272.0331697942.

Adding to 20131011 its reverse (11013102), we get a palindrome (31144113).

It can be divided in two parts, 2013101 and 1, that added together give a palindrome (2013102).

The spelling of 20131011 in words is "twenty million, one hundred thirty-one thousand, eleven".