21475033 has 4 divisors (see below), whose sum is σ = 22167808. Its totient is φ = 20782260.

The previous prime is 21475019. The next prime is 21475043. The reversal of 21475033 is 33057412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21475033 - 2⁵ = 21475001 is a prime.

It is a super-2 number, since 2×21475033² = 922354084702178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21474989 and 21475007.

It is not an unprimeable number, because it can be changed into a prime (21475043) 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, 346341 + ... + 346402.

It is an arithmetic number, because the mean of its divisors is an integer number (5541952).

Almost surely, 2^21475033 is an apocalyptic number.

It is an amenable number.

21475033 is a deficient number, since it is larger than the sum of its proper divisors (692775).

21475033 is an equidigital number, since it uses as much as digits as its factorization.

21475033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692774.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 21475033 is about 4634.1162048442. The cubic root of 21475033 is about 277.9572118126.

The spelling of 21475033 in words is "twenty-one million, four hundred seventy-five thousand, thirty-three".