21841422 has 16 divisors (see below), whose sum is σ = 45092352. Its totient is φ = 7045560.

The previous prime is 21841409. The next prime is 21841427. The reversal of 21841422 is 22414812.

It is a junction number, because it is equal to n+sod(n) for n = 21841392 and 21841401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21841427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58528 + ... + 58899.

It is an arithmetic number, because the mean of its divisors is an integer number (2818272).

Almost surely, 2^21841422 is an apocalyptic number.

21841422 is an abundant number, since it is smaller than the sum of its proper divisors (23250930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21841422 is a wasteful number, since it uses less digits than its factorization.

21841422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117463.

The product of its digits is 1024, while the sum is 24.

The square root of 21841422 is about 4673.4807156979. The cubic root of 21841422 is about 279.5290638116.

The spelling of 21841422 in words is "twenty-one million, eight hundred forty-one thousand, four hundred twenty-two".