21746226 has 8 divisors (see below), whose sum is σ = 43492464. Its totient is φ = 7248740.

The previous prime is 21746183. The next prime is 21746233. The reversal of 21746226 is 62264712.

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

21746226 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21746193 and 21746202.

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, 1812180 + ... + 1812191.

It is an arithmetic number, because the mean of its divisors is an integer number (5436558).

Almost surely, 2^21746226 is an apocalyptic number.

21746226 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.

21746226 is a wasteful number, since it uses less digits than its factorization.

21746226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624376.

The product of its digits is 8064, while the sum is 30.

The square root of 21746226 is about 4663.2848937203. The cubic root of 21746226 is about 279.1223625344.

The spelling of 21746226 in words is "twenty-one million, seven hundred forty-six thousand, two hundred twenty-six".