21446494 has 4 divisors (see below), whose sum is σ = 32169744. Its totient is φ = 10723246.

The previous prime is 21446489. The next prime is 21446501. The reversal of 21446494 is 49464412.

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, 5361622 + ... + 5361625.

It is an arithmetic number, because the mean of its divisors is an integer number (8042436).

Almost surely, 2^21446494 is an apocalyptic number.

21446494 is a deficient number, since it is larger than the sum of its proper divisors (10723250).

21446494 is a wasteful number, since it uses less digits than its factorization.

21446494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10723249.

The product of its digits is 27648, while the sum is 34.

The square root of 21446494 is about 4631.0359532182. The cubic root of 21446494 is about 277.8340278738.

The spelling of 21446494 in words is "twenty-one million, four hundred forty-six thousand, four hundred ninety-four".