20340140430 has 16 divisors (see below), whose sum is σ = 48816337104. Its totient is φ = 5424037440.

The previous prime is 20340140419. The next prime is 20340140473. The reversal of 20340140430 is 3404104302.

It is a junction number, because it is equal to n+sod(n) for n = 20340140397 and 20340140406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339002311 + ... + 339002370.

It is an arithmetic number, because the mean of its divisors is an integer number (3051021069).

Almost surely, 2^20340140430 is an apocalyptic number.

20340140430 is an abundant number, since it is smaller than the sum of its proper divisors (28476196674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20340140430 is a wasteful number, since it uses less digits than its factorization.

20340140430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678004691.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20340140430 its reverse (3404104302), we get a palindrome (23744244732).

The spelling of 20340140430 in words is "twenty billion, three hundred forty million, one hundred forty thousand, four hundred thirty".