21133045 has 8 divisors (see below), whose sum is σ = 25665696. Its totient is φ = 16702416.

The previous prime is 21133027. The next prime is 21133087. The reversal of 21133045 is 54033112.

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 21133045 - 2¹³ = 21124853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25047 + ... + 25876.

It is an arithmetic number, because the mean of its divisors is an integer number (3208212).

Almost surely, 2^21133045 is an apocalyptic number.

It is an amenable number.

21133045 is a deficient number, since it is larger than the sum of its proper divisors (4532651).

21133045 is an equidigital number, since it uses as much as digits as its factorization.

21133045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51011.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 21133045 is about 4597.0691750288. The cubic root of 21133045 is about 276.4738281382.

Adding to 21133045 its reverse (54033112), we get a palindrome (75166157).

The spelling of 21133045 in words is "twenty-one million, one hundred thirty-three thousand, forty-five".