20344140340 has 24 divisors (see below), whose sum is σ = 42795500832. Its totient is φ = 8123788320.

The previous prime is 20344140337. The next prime is 20344140359. The reversal of 20344140340 is 4304144302.

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, 854706 + ... + 878185.

It is an arithmetic number, because the mean of its divisors is an integer number (1783145868).

Almost surely, 2^20344140340 is an apocalyptic number.

20344140340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344140340 is an abundant number, since it is smaller than the sum of its proper divisors (22451360492).

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

20344140340 is a wasteful number, since it uses less digits than its factorization.

20344140340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733487 (or 1733485 counting only the distinct ones).

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

Adding to 20344140340 its reverse (4304144302), we get a palindrome (24648284642).

The spelling of 20344140340 in words is "twenty billion, three hundred forty-four million, one hundred forty thousand, three hundred forty".