21345634423352 has 16 divisors (see below), whose sum is σ = 40026997394160. Its totient is φ = 10671768451584.

The previous prime is 21345634423313. The next prime is 21345634423417. The reversal of 21345634423352 is 25332443654312.

It is a super-2 number, since 2×21345634423352² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21345634423297 and 21345634423306.

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 3 ways as a sum of consecutive naturals, for example, 131008508 + ... + 131171339.

It is an arithmetic number, because the mean of its divisors is an integer number (2501687337135).

Almost surely, 2^{21345634423352} is an apocalyptic number.

It is an amenable number.

21345634423352 is a deficient number, since it is larger than the sum of its proper divisors (18681362970808).

21345634423352 is a wasteful number, since it uses less digits than its factorization.

21345634423352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262190030 (or 262190026 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 47.

The spelling of 21345634423352 in words is "twenty-one trillion, three hundred forty-five billion, six hundred thirty-four million, four hundred twenty-three thousand, three hundred fifty-two".