21032193 has 16 divisors (see below), whose sum is σ = 34514816. Its totient is φ = 11093760.

The previous prime is 21032161. The next prime is 21032197. The reversal of 21032193 is 39123012.

It is a happy number.

It is not a de Polignac number, because 21032193 - 2⁵ = 21032161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21032197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38248 + ... + 38793.

It is an arithmetic number, because the mean of its divisors is an integer number (2157176).

Almost surely, 2^21032193 is an apocalyptic number.

It is an amenable number.

21032193 is a deficient number, since it is larger than the sum of its proper divisors (13482623).

21032193 is a wasteful number, since it uses less digits than its factorization.

21032193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77064.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 21032193 is about 4586.0868940743. The cubic root of 21032193 is about 276.0333266835.

The spelling of 21032193 in words is "twenty-one million, thirty-two thousand, one hundred ninety-three".