21074744 has 16 divisors (see below), whose sum is σ = 39738600. Its totient is φ = 10477792.

The previous prime is 21074737. The next prime is 21074791. The reversal of 21074744 is 44747012.

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, 5927 + ... + 8790.

Almost surely, 2^21074744 is an apocalyptic number.

It is an amenable number.

21074744 is a deficient number, since it is larger than the sum of its proper divisors (18663856).

21074744 is a wasteful number, since it uses less digits than its factorization.

21074744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14902 (or 14898 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 21074744 is about 4590.7236902258. The cubic root of 21074744 is about 276.2193523326.

The spelling of 21074744 in words is "twenty-one million, seventy-four thousand, seven hundred forty-four".