21340361153402 has 16 divisors (see below), whose sum is σ = 32031210551040. Its totient is φ = 10663292638032.

The previous prime is 21340361153359. The next prime is 21340361153519. The reversal of 21340361153402 is 20435116304312.

It is a super-2 number, since 2×21340361153402² (a number of 27 digits) contains 22 as substring.

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, 25428224 + ... + 26254052.

It is an arithmetic number, because the mean of its divisors is an integer number (2001950659440).

Almost surely, 2^{21340361153402} is an apocalyptic number.

21340361153402 is a deficient number, since it is larger than the sum of its proper divisors (10690849397638).

21340361153402 is a wasteful number, since it uses less digits than its factorization.

21340361153402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834157.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 21340361153402 its reverse (20435116304312), we get a palindrome (41775477457714).

The spelling of 21340361153402 in words is "twenty-one trillion, three hundred forty billion, three hundred sixty-one million, one hundred fifty-three thousand, four hundred two".