21226862 has 4 divisors (see below), whose sum is σ = 31840296. Its totient is φ = 10613430.

The previous prime is 21226853. The next prime is 21226879. The reversal of 21226862 is 26862212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5306714 + ... + 5306717.

It is an arithmetic number, because the mean of its divisors is an integer number (7960074).

Almost surely, 2^21226862 is an apocalyptic number.

21226862 is a deficient number, since it is larger than the sum of its proper divisors (10613434).

21226862 is a wasteful number, since it uses less digits than its factorization.

21226862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613433.

The product of its digits is 4608, while the sum is 29.

The square root of 21226862 is about 4607.2618766465. The cubic root of 21226862 is about 276.8823456515.

The spelling of 21226862 in words is "twenty-one million, two hundred twenty-six thousand, eight hundred sixty-two".