21342233424340 has 24 divisors (see below), whose sum is σ = 44818829308512. Its totient is φ = 8536866871200.

The previous prime is 21342233424331. The next prime is 21342233424359. The reversal of 21342233424340 is 4342433224312.

It is a self number, because there is not a number n which added to its sum of digits gives 21342233424340.

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, 5757687 + ... + 8708353.

It is an arithmetic number, because the mean of its divisors is an integer number (1867451221188).

Almost surely, 2^{21342233424340} is an apocalyptic number.

21342233424340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342233424340 is an abundant number, since it is smaller than the sum of its proper divisors (23476595884172).

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

21342233424340 is a wasteful number, since it uses less digits than its factorization.

21342233424340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312327 (or 3312325 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 21342233424340 its reverse (4342433224312), we get a palindrome (25684666648652).

The spelling of 21342233424340 in words is "twenty-one trillion, three hundred forty-two billion, two hundred thirty-three million, four hundred twenty-four thousand, three hundred forty".