20013133 has 4 divisors (see below), whose sum is σ = 22872160. Its totient is φ = 17154108.

The previous prime is 20013127. The next prime is 20013179. The reversal of 20013133 is 33131002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20013133 - 2²¹ = 17915981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013193) 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, 1429503 + ... + 1429516.

It is an arithmetic number, because the mean of its divisors is an integer number (5718040).

Almost surely, 2^20013133 is an apocalyptic number.

It is an amenable number.

20013133 is a deficient number, since it is larger than the sum of its proper divisors (2859027).

20013133 is an equidigital number, since it uses as much as digits as its factorization.

20013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859026.

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

The square root of 20013133 is about 4473.6040280740. The cubic root of 20013133 is about 271.5011627371.

Adding to 20013133 its reverse (33131002), we get a palindrome (53144135).

The spelling of 20013133 in words is "twenty million, thirteen thousand, one hundred thirty-three".