20473133 has 4 divisors (see below), whose sum is σ = 20487900. Its totient is φ = 20458368.

The previous prime is 20473129. The next prime is 20473139. The reversal of 20473133 is 33137402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7606564 + 12866569 = 2758^2 + 3587^2 .

It is a cyclic number.

It is not a de Polignac number, because 20473133 - 2² = 20473129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20473099 and 20473108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473139) 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, 5060 + ... + 8157.

It is an arithmetic number, because the mean of its divisors is an integer number (5121975).

Almost surely, 2^20473133 is an apocalyptic number.

It is an amenable number.

20473133 is a deficient number, since it is larger than the sum of its proper divisors (14767).

20473133 is a wasteful number, since it uses less digits than its factorization.

20473133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14766.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20473133 is about 4524.7246325053. The cubic root of 20473133 is about 273.5655688706.

It can be divided in two parts, 204 and 73133, that added together give a palindrome (73337).

The spelling of 20473133 in words is "twenty million, four hundred seventy-three thousand, one hundred thirty-three".