21962 has 8 divisors (see below), whose sum is σ = 33600. Its totient is φ = 10764.

The previous prime is 21961. The next prime is 21977. The reversal of 21962 is 26912.

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

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21962.

It is not an unprimeable number, because it can be changed into a prime (21961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 227.

It is an arithmetic number, because the mean of its divisors is an integer number (4200).

2²¹⁹⁶² is an apocalyptic number.

21962 is a deficient number, since it is larger than the sum of its proper divisors (11638).

21962 is a wasteful number, since it uses less digits than its factorization.

21962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its digits is 216, while the sum is 20.

The square root of 21962 is about 148.1958164052. The cubic root of 21962 is about 28.0042510552.

Subtracting 21962 from its reverse (26912), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 21 and 962, that multiplied together give a palindrome (20202).

The spelling of 21962 in words is "twenty-one thousand, nine hundred sixty-two".