20671433 has 4 divisors (see below), whose sum is σ = 21152208. Its totient is φ = 20190660.

The previous prime is 20671423. The next prime is 20671471. The reversal of 20671433 is 33417602.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33417602 = 2 ⋅16708801.

It is a cyclic number.

It is not a de Polignac number, because 20671433 - 2¹⁴ = 20655049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20671423) 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, 240323 + ... + 240408.

It is an arithmetic number, because the mean of its divisors is an integer number (5288052).

Almost surely, 2^20671433 is an apocalyptic number.

It is an amenable number.

20671433 is a deficient number, since it is larger than the sum of its proper divisors (480775).

20671433 is an equidigital number, since it uses as much as digits as its factorization.

20671433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480774.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20671433 is about 4546.5847622144. The cubic root of 20671433 is about 274.4459721826.

The spelling of 20671433 in words is "twenty million, six hundred seventy-one thousand, four hundred thirty-three".