21796846 has 4 divisors (see below), whose sum is σ = 32695272. Its totient is φ = 10898422.

The previous prime is 21796843. The next prime is 21796867. The reversal of 21796846 is 64869712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5449210 + ... + 5449213.

It is an arithmetic number, because the mean of its divisors is an integer number (8173818).

Almost surely, 2^21796846 is an apocalyptic number.

21796846 is a deficient number, since it is larger than the sum of its proper divisors (10898426).

21796846 is a wasteful number, since it uses less digits than its factorization.

21796846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10898425.

The product of its digits is 145152, while the sum is 43.

The square root of 21796846 is about 4668.7092434633. The cubic root of 21796846 is about 279.3387713500.

It can be divided in two parts, 2179 and 6846, that added together give a square (9025 = 95²).

The spelling of 21796846 in words is "twenty-one million, seven hundred ninety-six thousand, eight hundred forty-six".