20343434440 has 32 divisors (see below), whose sum is σ = 52311689280. Its totient is φ = 6974891712.

The previous prime is 20343434411. The next prime is 20343434453. The reversal of 20343434440 is 4443434302.

It is a super-2 number, since 2×20343434440² (a number of 21 digits) contains 22 as substring.

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, 36327282 + ... + 36327841.

It is an arithmetic number, because the mean of its divisors is an integer number (1634740290).

Almost surely, 2^20343434440 is an apocalyptic number.

20343434440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20343434440 is an abundant number, since it is smaller than the sum of its proper divisors (31968254840).

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

20343434440 is a wasteful number, since it uses less digits than its factorization.

20343434440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72655141 (or 72655137 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 20343434440 its reverse (4443434302), we get a palindrome (24786868742).

The spelling of 20343434440 in words is "twenty billion, three hundred forty-three million, four hundred thirty-four thousand, four hundred forty".