20434251343 has 8 divisors (see below), whose sum is σ = 22293040896. Its totient is φ = 18575650200.

The previous prime is 20434251329. The next prime is 20434251367. The reversal of 20434251343 is 34315243402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434251343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434251743) 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, 276180 + ... + 342262.

It is an arithmetic number, because the mean of its divisors is an integer number (2786630112).

Almost surely, 2^20434251343 is an apocalyptic number.

20434251343 is a deficient number, since it is larger than the sum of its proper divisors (1858789553).

20434251343 is a wasteful number, since it uses less digits than its factorization.

20434251343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94205.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 20434251343 its reverse (34315243402), we get a palindrome (54749494745).

The spelling of 20434251343 in words is "twenty billion, four hundred thirty-four million, two hundred fifty-one thousand, three hundred forty-three".