21223862 has 8 divisors (see below), whose sum is σ = 34729992. Its totient is φ = 9647200.

The previous prime is 21223849. The next prime is 21223883. The reversal of 21223862 is 26832212.

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

It is a congruent 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, 482339 + ... + 482382.

It is an arithmetic number, because the mean of its divisors is an integer number (4341249).

Almost surely, 2^21223862 is an apocalyptic number.

21223862 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21223862 is a deficient number, since it is larger than the sum of its proper divisors (13506130).

21223862 is a wasteful number, since it uses less digits than its factorization.

21223862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964734.

The product of its digits is 2304, while the sum is 26.

The square root of 21223862 is about 4606.9362921577. The cubic root of 21223862 is about 276.8693010766.

The spelling of 21223862 in words is "twenty-one million, two hundred twenty-three thousand, eight hundred sixty-two".