20312433 has 12 divisors (see below), whose sum is σ = 31066308. Its totient is φ = 12744960.

The previous prime is 20312429. The next prime is 20312437. The reversal of 20312433 is 33421302.

It is an interprime number because it is at equal distance from previous prime (20312429) and next prime (20312437).

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 6718464 = 3687^2 + 2592^2 .

It is not a de Polignac number, because 20312433 - 2² = 20312429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66228 + ... + 66533.

It is an arithmetic number, because the mean of its divisors is an integer number (2588859).

Almost surely, 2^20312433 is an apocalyptic number.

It is an amenable number.

20312433 is a deficient number, since it is larger than the sum of its proper divisors (10753875).

20312433 is a wasteful number, since it uses less digits than its factorization.

20312433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132784 (or 132781 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20312433 is about 4506.9316613412. The cubic root of 20312433 is about 272.8479207718.

Adding to 20312433 its reverse (33421302), we get a palindrome (53733735).

The spelling of 20312433 in words is "twenty million, three hundred twelve thousand, four hundred thirty-three".