21854022 has 8 divisors (see below), whose sum is σ = 43708056. Its totient is φ = 7284672.

The previous prime is 21854011. The next prime is 21854051. The reversal of 21854022 is 22045812.

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

21854022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21853983 and 21854001.

It is a congruent number.

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, 1821163 + ... + 1821174.

It is an arithmetic number, because the mean of its divisors is an integer number (5463507).

Almost surely, 2^21854022 is an apocalyptic number.

21854022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21854022 is a wasteful number, since it uses less digits than its factorization.

21854022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642342.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 21854022 is about 4674.8285530060. The cubic root of 21854022 is about 279.5828055681.

Adding to 21854022 its reverse (22045812), we get a palindrome (43899834).

The spelling of 21854022 in words is "twenty-one million, eight hundred fifty-four thousand, twenty-two".