21342363 has 8 divisors (see below), whose sum is σ = 32521728. Its totient is φ = 12195624.

The previous prime is 21342359. The next prime is 21342379. The reversal of 21342363 is 36324312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21342363 - 2² = 21342359 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21342383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508131 + ... + 508172.

It is an arithmetic number, because the mean of its divisors is an integer number (4065216).

Almost surely, 2^21342363 is an apocalyptic number.

21342363 is a deficient number, since it is larger than the sum of its proper divisors (11179365).

21342363 is a wasteful number, since it uses less digits than its factorization.

21342363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016313.

The product of its digits is 2592, while the sum is 24.

The square root of 21342363 is about 4619.7795401945. The cubic root of 21342363 is about 277.3836343532.

Adding to 21342363 its reverse (36324312), we get a palindrome (57666675).

The spelling of 21342363 in words is "twenty-one million, three hundred forty-two thousand, three hundred sixty-three".