21226874 has 8 divisors (see below), whose sum is σ = 32138208. Its totient is φ = 10514140.

The previous prime is 21226853. The next prime is 21226879. The reversal of 21226874 is 47862212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21226874.

It is not an unprimeable number, because it can be changed into a prime (21226879) 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, 49382 + ... + 49809.

It is an arithmetic number, because the mean of its divisors is an integer number (4017276).

Almost surely, 2^21226874 is an apocalyptic number.

21226874 is a deficient number, since it is larger than the sum of its proper divisors (10911334).

21226874 is a wasteful number, since it uses less digits than its factorization.

21226874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99300.

The product of its digits is 10752, while the sum is 32.

The square root of 21226874 is about 4607.2631789382. The cubic root of 21226874 is about 276.8823978273.

The spelling of 21226874 in words is "twenty-one million, two hundred twenty-six thousand, eight hundred seventy-four".