21454622 has 16 divisors (see below), whose sum is σ = 37145952. Its totient is φ = 9103200.

The previous prime is 21454621. The next prime is 21454637. The reversal of 21454622 is 22645412.

It is a junction number, because it is equal to n+sod(n) for n = 21454591 and 21454600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454621) 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, 6173 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (2321622).

Almost surely, 2^21454622 is an apocalyptic number.

21454622 is a deficient number, since it is larger than the sum of its proper divisors (15691330).

21454622 is a wasteful number, since it uses less digits than its factorization.

21454622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15283.

The product of its digits is 3840, while the sum is 26.

The square root of 21454622 is about 4631.9134275157. The cubic root of 21454622 is about 277.8691221842.

It can be divided in two parts, 2145462 and 2, that multiplied together give a palindrome (4290924).

The spelling of 21454622 in words is "twenty-one million, four hundred fifty-four thousand, six hundred twenty-two".