20813433 has 8 divisors (see below), whose sum is σ = 28341888. Its totient is φ = 13580304.

The previous prime is 20813399. The next prime is 20813447. The reversal of 20813433 is 33431802.

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

It is not a de Polignac number, because 20813433 - 2⁹ = 20812921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20813473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73666 + ... + 73947.

It is an arithmetic number, because the mean of its divisors is an integer number (3542736).

Almost surely, 2^20813433 is an apocalyptic number.

It is an amenable number.

20813433 is a deficient number, since it is larger than the sum of its proper divisors (7528455).

20813433 is a wasteful number, since it uses less digits than its factorization.

20813433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147663.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20813433 is about 4562.1741527478. The cubic root of 20813433 is about 275.0729635596.

The spelling of 20813433 in words is "twenty million, eight hundred thirteen thousand, four hundred thirty-three".