21622063 has 4 divisors (see below), whose sum is σ = 21895840. Its totient is φ = 21348288.

The previous prime is 21622061. The next prime is 21622099. The reversal of 21622063 is 36022612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21622063 - 2¹ = 21622061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622061) 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, 136770 + ... + 136927.

It is an arithmetic number, because the mean of its divisors is an integer number (5473960).

Almost surely, 2^21622063 is an apocalyptic number.

21622063 is a deficient number, since it is larger than the sum of its proper divisors (273777).

21622063 is an equidigital number, since it uses as much as digits as its factorization.

21622063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273776.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21622063 is about 4649.9530105153. The cubic root of 21622063 is about 278.5901193934.

Adding to 21622063 its reverse (36022612), we get a palindrome (57644675).

It can be divided in two parts, 2162 and 2063, that added together give a square (4225 = 65²).

The spelling of 21622063 in words is "twenty-one million, six hundred twenty-two thousand, sixty-three".