20033131 has 4 divisors (see below), whose sum is σ = 20134000. Its totient is φ = 19932264.

The previous prime is 20033093. The next prime is 20033137. The reversal of 20033131 is 13133002.

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 20033131 - 2⁹ = 20032619 is a prime.

It is a super-2 number, since 2×20033131² = 802652675326322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20033137) 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, 50136 + ... + 50533.

It is an arithmetic number, because the mean of its divisors is an integer number (5033500).

Almost surely, 2^20033131 is an apocalyptic number.

20033131 is a deficient number, since it is larger than the sum of its proper divisors (100869).

20033131 is a wasteful number, since it uses less digits than its factorization.

20033131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100868.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20033131 is about 4475.8385806461. The cubic root of 20033131 is about 271.5915645880.

Adding to 20033131 its reverse (13133002), we get a palindrome (33166133).

It can be divided in two parts, 20033 and 131, that added together give a square (20164 = 142²).

The spelling of 20033131 in words is "twenty million, thirty-three thousand, one hundred thirty-one".