20412120243 has 16 divisors (see below), whose sum is σ = 27323136000. Its totient is φ = 13554691200.

The previous prime is 20412120217. The next prime is 20412120263. The reversal of 20412120243 is 34202121402.

It is not a de Polignac number, because 20412120243 - 2⁹ = 20412119731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20412120203) 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, 853158 + ... + 876756.

It is an arithmetic number, because the mean of its divisors is an integer number (1707696000).

Almost surely, 2^20412120243 is an apocalyptic number.

20412120243 is a deficient number, since it is larger than the sum of its proper divisors (6911015757).

20412120243 is a wasteful number, since it uses less digits than its factorization.

20412120243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24722.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20412120243 its reverse (34202121402), we get a palindrome (54614241645).

The spelling of 20412120243 in words is "twenty billion, four hundred twelve million, one hundred twenty thousand, two hundred forty-three".