20426133 has 16 divisors (see below), whose sum is σ = 33520256. Its totient is φ = 10774080.

The previous prime is 20426111. The next prime is 20426137. The reversal of 20426133 is 33162402.

It is a happy number.

It is not a de Polignac number, because 20426133 - 2⁶ = 20426069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37138 + ... + 37683.

It is an arithmetic number, because the mean of its divisors is an integer number (2095016).

Almost surely, 2^20426133 is an apocalyptic number.

It is an amenable number.

20426133 is a deficient number, since it is larger than the sum of its proper divisors (13094123).

20426133 is a wasteful number, since it uses less digits than its factorization.

20426133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74844.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20426133 is about 4519.5279620775. The cubic root of 20426133 is about 273.3560677435.

Adding to 20426133 its reverse (33162402), we get a palindrome (53588535).

The spelling of 20426133 in words is "twenty million, four hundred twenty-six thousand, one hundred thirty-three".