21434103340 has 24 divisors (see below), whose sum is σ = 48474049680. Its totient is φ = 7914130368.

The previous prime is 21434103337. The next prime is 21434103343. The reversal of 21434103340 is 4330143412.

It is an interprime number because it is at equal distance from previous prime (21434103337) and next prime (21434103343).

It is not an unprimeable number, because it can be changed into a prime (21434103343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41219170 + ... + 41219689.

It is an arithmetic number, because the mean of its divisors is an integer number (2019752070).

Almost surely, 2^21434103340 is an apocalyptic number.

21434103340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21434103340 is an abundant number, since it is smaller than the sum of its proper divisors (27039946340).

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

21434103340 is a wasteful number, since it uses less digits than its factorization.

21434103340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82438881 (or 82438879 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21434103340 its reverse (4330143412), we get a palindrome (25764246752).

The spelling of 21434103340 in words is "twenty-one billion, four hundred thirty-four million, one hundred three thousand, three hundred forty".