21194053 has 8 divisors (see below), whose sum is σ = 22503960. Its totient is φ = 19891200.

The previous prime is 21194029. The next prime is 21194077. The reversal of 21194053 is 35049112.

It is an interprime number because it is at equal distance from previous prime (21194029) and next prime (21194077).

It can be written as a sum of positive squares in 4 ways, for example, as 8958049 + 12236004 = 2993^2 + 3498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21194053 - 2⁵ = 21194021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21194083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5263 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (2812995).

Almost surely, 2^21194053 is an apocalyptic number.

It is an amenable number.

21194053 is a deficient number, since it is larger than the sum of its proper divisors (1309907).

21194053 is a wasteful number, since it uses less digits than its factorization.

21194053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3527.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21194053 is about 4603.6999250603. The cubic root of 21194053 is about 276.7396189937.

The spelling of 21194053 in words is "twenty-one million, one hundred ninety-four thousand, fifty-three".