20342100443 has 12 divisors (see below), whose sum is σ = 23688144360. Its totient is φ = 17417750112.

The previous prime is 20342100437. The next prime is 20342100451. The reversal of 20342100443 is 34400124302.

It is not a de Polignac number, because 20342100443 - 2¹⁶ = 20342034907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342100143) 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, 171113 + ... + 264506.

It is an arithmetic number, because the mean of its divisors is an integer number (1974012030).

Almost surely, 2^20342100443 is an apocalyptic number.

20342100443 is a deficient number, since it is larger than the sum of its proper divisors (3346043917).

20342100443 is an equidigital number, since it uses as much as digits as its factorization.

20342100443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436586 (or 436579 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20342100443 its reverse (34400124302), we get a palindrome (54742224745).

The spelling of 20342100443 in words is "twenty billion, three hundred forty-two million, one hundred thousand, four hundred forty-three".