21353114343 has 16 divisors (see below), whose sum is σ = 31084365312. Its totient is φ = 12930744000.

The previous prime is 21353114317. The next prime is 21353114351. The reversal of 21353114343 is 34341135312.

It is a happy number.

It is not a de Polignac number, because 21353114343 - 2⁵ = 21353114311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21353114343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21353114353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222198 + ... + 303443.

It is an arithmetic number, because the mean of its divisors is an integer number (1942772832).

Almost surely, 2^21353114343 is an apocalyptic number.

21353114343 is a deficient number, since it is larger than the sum of its proper divisors (9731250969).

21353114343 is a wasteful number, since it uses less digits than its factorization.

21353114343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526886.

The product of its digits is 12960, while the sum is 30.

Adding to 21353114343 its reverse (34341135312), we get a palindrome (55694249655).

The spelling of 21353114343 in words is "twenty-one billion, three hundred fifty-three million, one hundred fourteen thousand, three hundred forty-three".