20403434343 has 8 divisors (see below), whose sum is σ = 28387387008. Its totient is φ = 13010885624.

The previous prime is 20403434341. The next prime is 20403434347. The reversal of 20403434343 is 34343430402.

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

It is a cyclic number.

It is not a de Polignac number, because 20403434343 - 2¹ = 20403434341 is a prime.

It is a super-2 number, since 2×20403434343² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20403434343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403434341) 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, 147850905 + ... + 147851042.

It is an arithmetic number, because the mean of its divisors is an integer number (3548423376).

Almost surely, 2^20403434343 is an apocalyptic number.

20403434343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20403434343 is a deficient number, since it is larger than the sum of its proper divisors (7983952665).

20403434343 is a wasteful number, since it uses less digits than its factorization.

20403434343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295701973.

The product of its (nonzero) digits is 41472, while the sum is 30.

Adding to 20403434343 its reverse (34343430402), we get a palindrome (54746864745).

The spelling of 20403434343 in words is "twenty billion, four hundred three million, four hundred thirty-four thousand, three hundred forty-three".