21827226 has 16 divisors (see below), whose sum is σ = 44208000. Its totient is φ = 7183488.

The previous prime is 21827191. The next prime is 21827233. The reversal of 21827226 is 62272812.

It is a junction number, because it is equal to n+sod(n) for n = 21827193 and 21827202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22551 + ... + 23498.

It is an arithmetic number, because the mean of its divisors is an integer number (2763000).

Almost surely, 2^21827226 is an apocalyptic number.

21827226 is an abundant number, since it is smaller than the sum of its proper divisors (22380774).

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

21827226 is a wasteful number, since it uses less digits than its factorization.

21827226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46133.

The product of its digits is 5376, while the sum is 30.

The square root of 21827226 is about 4671.9616864867. The cubic root of 21827226 is about 279.4684899989.

The spelling of 21827226 in words is "twenty-one million, eight hundred twenty-seven thousand, two hundred twenty-six".