20875633 has 4 divisors (see below), whose sum is σ = 21169728. Its totient is φ = 20581540.

The previous prime is 20875627. The next prime is 20875637. The reversal of 20875633 is 33657802.

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 20875633 - 2²¹ = 18778481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20875637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146941 + ... + 147082.

It is an arithmetic number, because the mean of its divisors is an integer number (5292432).

Almost surely, 2^20875633 is an apocalyptic number.

It is an amenable number.

20875633 is a deficient number, since it is larger than the sum of its proper divisors (294095).

20875633 is an equidigital number, since it uses as much as digits as its factorization.

20875633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294094.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 20875633 is about 4568.9859925371. The cubic root of 20875633 is about 275.3467054082.

The spelling of 20875633 in words is "twenty million, eight hundred seventy-five thousand, six hundred thirty-three".