20340344140 has 12 divisors (see below), whose sum is σ = 42714722736. Its totient is φ = 8136137648.

The previous prime is 20340344131. The next prime is 20340344153. The reversal of 20340344140 is 4144304302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508508584 + ... + 508508623.

It is an arithmetic number, because the mean of its divisors is an integer number (3559560228).

Almost surely, 2^20340344140 is an apocalyptic number.

20340344140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340344140 is an abundant number, since it is smaller than the sum of its proper divisors (22374378596).

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

20340344140 is a wasteful number, since it uses less digits than its factorization.

20340344140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017017216 (or 1017017214 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20340344140 its reverse (4144304302), we get a palindrome (24484648442).

The spelling of 20340344140 in words is "twenty billion, three hundred forty million, three hundred forty-four thousand, one hundred forty".