20555433 has 6 divisors (see below), whose sum is σ = 29691194. Its totient is φ = 13703616.

The previous prime is 20555417. The next prime is 20555443. The reversal of 20555433 is 33455502.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 1996569 = 4308^2 + 1413^2 .

It is not a de Polignac number, because 20555433 - 2⁴ = 20555417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20555397 and 20555406.

It is not an unprimeable number, because it can be changed into a prime (20555443) 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 5 ways as a sum of consecutive naturals, for example, 1141960 + ... + 1141977.

Almost surely, 2^20555433 is an apocalyptic number.

It is an amenable number.

20555433 is a deficient number, since it is larger than the sum of its proper divisors (9135761).

20555433 is a wasteful number, since it uses less digits than its factorization.

20555433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283943 (or 2283940 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 20555433 is about 4533.8099871962. The cubic root of 20555433 is about 273.9316477521.

The spelling of 20555433 in words is "twenty million, five hundred fifty-five thousand, four hundred thirty-three".