21340635352 has 32 divisors (see below), whose sum is σ = 41316209280. Its totient is φ = 10323175680.

The previous prime is 21340635301. The next prime is 21340635367. The reversal of 21340635352 is 25353604312.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1044628 + ... + 1064860.

It is an arithmetic number, because the mean of its divisors is an integer number (1291131540).

Almost surely, 2^21340635352 is an apocalyptic number.

It is an amenable number.

21340635352 is a deficient number, since it is larger than the sum of its proper divisors (19975573928).

21340635352 is a wasteful number, since it uses less digits than its factorization.

21340635352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24523 (or 24519 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 21340635352 in words is "twenty-one billion, three hundred forty million, six hundred thirty-five thousand, three hundred fifty-two".