20219833 has 4 divisors (see below), whose sum is σ = 20325888. Its totient is φ = 20113780.

The previous prime is 20219809. The next prime is 20219839. The reversal of 20219833 is 33891202.

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 a de Polignac number, because none of the positive numbers 2^k-20219833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20219839) 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, 52741 + ... + 53122.

It is an arithmetic number, because the mean of its divisors is an integer number (5081472).

Almost surely, 2^20219833 is an apocalyptic number.

It is an amenable number.

20219833 is a deficient number, since it is larger than the sum of its proper divisors (106055).

20219833 is a wasteful number, since it uses less digits than its factorization.

20219833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106054.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20219833 is about 4496.6468618294. The cubic root of 20219833 is about 272.4326708499.

The spelling of 20219833 in words is "twenty million, two hundred nineteen thousand, eight hundred thirty-three".