20340134340 has 48 divisors (see below), whose sum is σ = 58276857408. Its totient is φ = 5297894784.

The previous prime is 20340134323. The next prime is 20340134393. The reversal of 20340134340 is 4343104302.

It is a self number, because there is not a number n which added to its sum of digits gives 20340134340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3939307 + ... + 3944466.

It is an arithmetic number, because the mean of its divisors is an integer number (1214101196).

Almost surely, 2^20340134340 is an apocalyptic number.

20340134340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340134340 is an abundant number, since it is smaller than the sum of its proper divisors (37936723068).

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

20340134340 is a wasteful number, since it uses less digits than its factorization.

20340134340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7883828 (or 7883826 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20340134340 its reverse (4343104302), we get a palindrome (24683238642).

The spelling of 20340134340 in words is "twenty billion, three hundred forty million, one hundred thirty-four thousand, three hundred forty".