21227874 has 8 divisors (see below), whose sum is σ = 42455760. Its totient is φ = 7075956.

The previous prime is 21227867. The next prime is 21227887. The reversal of 21227874 is 47872212.

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

21227874 is an admirable 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, 1768984 + ... + 1768995.

It is an arithmetic number, because the mean of its divisors is an integer number (5306970).

Almost surely, 2^21227874 is an apocalyptic number.

21227874 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.

21227874 is a wasteful number, since it uses less digits than its factorization.

21227874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537984.

The product of its digits is 12544, while the sum is 33.

The square root of 21227874 is about 4607.3717019576. The cubic root of 21227874 is about 276.8867457442.

The spelling of 21227874 in words is "twenty-one million, two hundred twenty-seven thousand, eight hundred seventy-four".