21494022 has 16 divisors (see below), whose sum is σ = 46896192. Its totient is φ = 6513320.

The previous prime is 21494009. The next prime is 21494027. The reversal of 21494022 is 22049412.

It is a junction number, because it is equal to n+sod(n) for n = 21493983 and 21494001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21494027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162768 + ... + 162899.

It is an arithmetic number, because the mean of its divisors is an integer number (2931012).

Almost surely, 2^21494022 is an apocalyptic number.

21494022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21494022 is an abundant number, since it is smaller than the sum of its proper divisors (25402170).

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

21494022 is a wasteful number, since it uses less digits than its factorization.

21494022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325683.

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

The square root of 21494022 is about 4636.1645786145. The cubic root of 21494022 is about 278.0391142797.

The spelling of 21494022 in words is "twenty-one million, four hundred ninety-four thousand, twenty-two".