20131006 has 16 divisors (see below), whose sum is σ = 34569216. Its totient is φ = 8612856.

The previous prime is 20130983. The next prime is 20131019. The reversal of 20131006 is 60013102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12795 + ... + 14281.

It is an arithmetic number, because the mean of its divisors is an integer number (2160576).

Almost surely, 2^20131006 is an apocalyptic number.

20131006 is a deficient number, since it is larger than the sum of its proper divisors (14438210).

20131006 is a wasteful number, since it uses less digits than its factorization.

20131006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20131006 is about 4486.7589638847. The cubic root of 20131006 is about 272.0331472723.

Adding to 20131006 its reverse (60013102), we get a palindrome (80144108).

It can be divided in two parts, 2013 and 1006, that multiplied together give a triangular number (2025078 = T₂₀₁₂).

The spelling of 20131006 in words is "twenty million, one hundred thirty-one thousand, six".