21362 has 8 divisors (see below), whose sum is σ = 34992. Its totient is φ = 9700.

The previous prime is 21347. The next prime is 21377. The reversal of 21362 is 26312.

It is an interprime number because it is at equal distance from previous prime (21347) and next prime (21377).

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

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21362.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464 + ... + 507.

It is an arithmetic number, because the mean of its divisors is an integer number (4374).

2²¹³⁶² is an apocalyptic number.

21362 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21362 is a deficient number, since it is larger than the sum of its proper divisors (13630).

21362 is a wasteful number, since it uses less digits than its factorization.

21362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its digits is 72, while the sum is 14.

The square root of 21362 is about 146.1574493483. The cubic root of 21362 is about 27.7468681367.

Adding to 21362 its reverse (26312), we get a palindrome (47674).

Subtracting 21362 from its reverse (26312), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 21 and 362, that added together give a palindrome (383).

The spelling of 21362 in words is "twenty-one thousand, three hundred sixty-two".