20312043 has 8 divisors (see below), whose sum is σ = 27245568. Its totient is φ = 13459944.

The previous prime is 20312021. The next prime is 20312053. The reversal of 20312043 is 34021302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20312043 - 2⁶ = 20311979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20312053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19771 + ... + 20772.

It is an arithmetic number, because the mean of its divisors is an integer number (3405696).

Almost surely, 2^20312043 is an apocalyptic number.

20312043 is a deficient number, since it is larger than the sum of its proper divisors (6933525).

20312043 is a wasteful number, since it uses less digits than its factorization.

20312043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40713.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20312043 is about 4506.8883944469. Note that the first 3 decimals coincide. The cubic root of 20312043 is about 272.8461745282.

Adding to 20312043 its reverse (34021302), we get a palindrome (54333345).

It can be divided in two parts, 203 and 12043, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 20312043 in words is "twenty million, three hundred twelve thousand, forty-three".