20353133 has 4 divisors (see below), whose sum is σ = 20371968. Its totient is φ = 20334300.

The previous prime is 20353121. The next prime is 20353153. The reversal of 20353133 is 33135302.

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 20353133 - 2⁴ = 20353117 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 (20353153) 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, 7691 + ... + 9992.

It is an arithmetic number, because the mean of its divisors is an integer number (5092992).

Almost surely, 2^20353133 is an apocalyptic number.

It is an amenable number.

20353133 is a deficient number, since it is larger than the sum of its proper divisors (18835).

20353133 is a wasteful number, since it uses less digits than its factorization.

20353133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18834.

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 20353133 is about 4511.4446688395. Note that the first 3 decimals coincide. The cubic root of 20353133 is about 273.0300342202.

Adding to 20353133 its reverse (33135302), we get a palindrome (53488435).

The spelling of 20353133 in words is "twenty million, three hundred fifty-three thousand, one hundred thirty-three".