20642433 has 8 divisors (see below), whose sum is σ = 31455168. Its totient is φ = 11795664.

The previous prime is 20642423. The next prime is 20642443. The reversal of 20642433 is 33424602.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20642423) and next prime (20642443).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20642433 - 2⁸ = 20642177 is a prime.

It is a super-2 number, since 2×20642433² = 852220080318978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20642423) 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 7 ways as a sum of consecutive naturals, for example, 491466 + ... + 491507.

It is an arithmetic number, because the mean of its divisors is an integer number (3931896).

Almost surely, 2^20642433 is an apocalyptic number.

It is an amenable number.

20642433 is a deficient number, since it is larger than the sum of its proper divisors (10812735).

20642433 is an equidigital number, since it uses as much as digits as its factorization.

20642433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982983.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20642433 is about 4543.3944358816. The cubic root of 20642433 is about 274.3175718283.

The spelling of 20642433 in words is "twenty million, six hundred forty-two thousand, four hundred thirty-three".