21094544 has 10 divisors (see below), whose sum is σ = 40870710. Its totient is φ = 10547264.

The previous prime is 21094531. The next prime is 21094559. The reversal of 21094544 is 44549012.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 1024144 = 4480^2 + 1012^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659189 + ... + 659220.

It is an arithmetic number, because the mean of its divisors is an integer number (4087071).

Almost surely, 2^21094544 is an apocalyptic number.

It is an amenable number.

21094544 is a deficient number, since it is larger than the sum of its proper divisors (19776166).

21094544 is a wasteful number, since it uses less digits than its factorization.

21094544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318417 (or 1318411 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 21094544 is about 4592.8797066764. The cubic root of 21094544 is about 276.3058291646.

The spelling of 21094544 in words is "twenty-one million, ninety-four thousand, five hundred forty-four".