21422094 has 8 divisors (see below), whose sum is σ = 42844200. Its totient is φ = 7140696.

The previous prime is 21422077. The next prime is 21422099. The reversal of 21422094 is 49022412.

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

21422094 is an admirable number.

It is a super-2 number, since 2×21422094² = 917812222689672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422099) 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, 1785169 + ... + 1785180.

It is an arithmetic number, because the mean of its divisors is an integer number (5355525).

Almost surely, 2^21422094 is an apocalyptic number.

21422094 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.

21422094 is a wasteful number, since it uses less digits than its factorization.

21422094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570354.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21422094 is about 4628.4008037334. The cubic root of 21422094 is about 277.7286225673.

The spelling of 21422094 in words is "twenty-one million, four hundred twenty-two thousand, ninety-four".