21996246 has 8 divisors (see below), whose sum is σ = 43992504. Its totient is φ = 7332080.

The previous prime is 21996229. The next prime is 21996251. The reversal of 21996246 is 64269912.

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

21996246 is an admirable number.

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, 1833015 + ... + 1833026.

It is an arithmetic number, because the mean of its divisors is an integer number (5499063).

Almost surely, 2^21996246 is an apocalyptic number.

21996246 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.

21996246 is a wasteful number, since it uses less digits than its factorization.

21996246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666046.

The product of its digits is 46656, while the sum is 39.

The square root of 21996246 is about 4690.0155650062. The cubic root of 21996246 is about 280.1879944989.

The spelling of 21996246 in words is "twenty-one million, nine hundred ninety-six thousand, two hundred forty-six".