21194504 has 16 divisors (see below), whose sum is σ = 39908220. Its totient is φ = 10552320.

The previous prime is 21194501. The next prime is 21194507. The reversal of 21194504 is 40549112.

It is an interprime number because it is at equal distance from previous prime (21194501) and next prime (21194507).

It can be written as a sum of positive squares in 2 ways, for example, as 21141604 + 52900 = 4598^2 + 230^2 .

It is not an unprimeable number, because it can be changed into a prime (21194501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569 + ... + 7424.

Almost surely, 2^21194504 is an apocalyptic number.

It is an amenable number.

21194504 is a deficient number, since it is larger than the sum of its proper divisors (18713716).

21194504 is a wasteful number, since it uses less digits than its factorization.

21194504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11240 (or 11236 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21194504 is about 4603.7489071408. The cubic root of 21194504 is about 276.7415819450.

The spelling of 21194504 in words is "twenty-one million, one hundred ninety-four thousand, five hundred four".