20131267 has 8 divisors (see below), whose sum is σ = 22184624. Its totient is φ = 18150048.

The previous prime is 20131259. The next prime is 20131271. The reversal of 20131267 is 76213102.

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

It is a cyclic number.

It is not a de Polignac number, because 20131267 - 2³ = 20131259 is a prime.

It is a super-2 number, since 2×20131267² = 810535822050578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17448 + ... + 18565.

It is an arithmetic number, because the mean of its divisors is an integer number (2773078).

Almost surely, 2^20131267 is an apocalyptic number.

20131267 is a deficient number, since it is larger than the sum of its proper divisors (2053357).

20131267 is a wasteful number, since it uses less digits than its factorization.

20131267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36069.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20131267 is about 4486.7880493734. The cubic root of 20131267 is about 272.0343229106.

Adding to 20131267 its reverse (76213102), we get a palindrome (96344369).

The spelling of 20131267 in words is "twenty million, one hundred thirty-one thousand, two hundred sixty-seven".