21295033 has 16 divisors (see below), whose sum is σ = 23794560. Its totient is φ = 18954496.

The previous prime is 21295013. The next prime is 21295037. The reversal of 21295033 is 33059212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21295033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21294989 and 21295007.

It is not an unprimeable number, because it can be changed into a prime (21295037) 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, 41583 + ... + 42091.

It is an arithmetic number, because the mean of its divisors is an integer number (1487160).

Almost surely, 2^21295033 is an apocalyptic number.

21295033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21295033 is a deficient number, since it is larger than the sum of its proper divisors (2499527).

21295033 is a wasteful number, since it uses less digits than its factorization.

21295033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 21295033 is about 4614.6541582225. The cubic root of 21295033 is about 277.1784355151.

The spelling of 21295033 in words is "twenty-one million, two hundred ninety-five thousand, thirty-three".