20412340443 has 36 divisors (see below), whose sum is σ = 33400432728. Its totient is φ = 12371071680.

The previous prime is 20412340441. The next prime is 20412340469. The reversal of 20412340443 is 34404321402.

It is a happy number.

20412340443 is a `hidden beast` number, since 204 + 12 + 3 + 4 + 0 + 443 = 666.

It is not a de Polignac number, because 20412340443 - 2¹ = 20412340441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20412340441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69246 + ... + 213587.

It is an arithmetic number, because the mean of its divisors is an integer number (927789798).

Almost surely, 2^20412340443 is an apocalyptic number.

20412340443 is a deficient number, since it is larger than the sum of its proper divisors (12988092285).

20412340443 is an frugal number, since it uses more digits than its factorization.

20412340443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282868 (or 282847 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20412340443 its reverse (34404321402), we get a palindrome (54816661845).

The spelling of 20412340443 in words is "twenty billion, four hundred twelve million, three hundred forty thousand, four hundred forty-three".