20455933 has 8 divisors (see below), whose sum is σ = 21562200. Its totient is φ = 19376448.

The previous prime is 20455927. The next prime is 20455943. The reversal of 20455933 is 33955402.

It can be written as a sum of positive squares in 4 ways, for example, as 582169 + 19873764 = 763^2 + 4458^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20455933 - 2¹³ = 20447741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20455895 and 20455904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455943) 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, 5118 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (2695275).

Almost surely, 2^20455933 is an apocalyptic number.

It is an amenable number.

20455933 is a deficient number, since it is larger than the sum of its proper divisors (1106267).

20455933 is a wasteful number, since it uses less digits than its factorization.

20455933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13391.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 20455933 is about 4522.8235649868. The cubic root of 20455933 is about 273.4889376081.

The spelling of 20455933 in words is "twenty million, four hundred fifty-five thousand, nine hundred thirty-three".