21341240352240 has 40 divisors (see below), whose sum is σ = 66157845092688. Its totient is φ = 5690997427200.

The previous prime is 21341240352239. The next prime is 21341240352287. The reversal of 21341240352240 is 4225304214312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44460917161 + ... + 44460917640.

Almost surely, 2^{21341240352240} is an apocalyptic number.

21341240352240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21341240352240 is an abundant number, since it is smaller than the sum of its proper divisors (44816604740448).

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

21341240352240 is a wasteful number, since it uses less digits than its factorization.

21341240352240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88921834817 (or 88921834811 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 21341240352240 its reverse (4225304214312), we get a palindrome (25566544566552).

The spelling of 21341240352240 in words is "twenty-one trillion, three hundred forty-one billion, two hundred forty million, three hundred fifty-two thousand, two hundred forty".