21446246 has 4 divisors (see below), whose sum is σ = 32169372. Its totient is φ = 10723122.

The previous prime is 21446237. The next prime is 21446261. The reversal of 21446246 is 64264412.

It is a happy number.

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, 5361560 + ... + 5361563.

It is an arithmetic number, because the mean of its divisors is an integer number (8042343).

Almost surely, 2^21446246 is an apocalyptic number.

21446246 is a deficient number, since it is larger than the sum of its proper divisors (10723126).

21446246 is a wasteful number, since it uses less digits than its factorization.

21446246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10723125.

The product of its digits is 9216, while the sum is 29.

The square root of 21446246 is about 4631.0091772744. The cubic root of 21446246 is about 277.8329569434.

The spelling of 21446246 in words is "twenty-one million, four hundred forty-six thousand, two hundred forty-six".