20555033 has 4 divisors (see below), whose sum is σ = 20802768. Its totient is φ = 20307300.

The previous prime is 20555009. The next prime is 20555071. The reversal of 20555033 is 33055502.

It is a happy number.

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: 33055502 = 2 ⋅16527751.

It is a cyclic number.

It is not a de Polignac number, because 20555033 - 2⁸ = 20554777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20555083) 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, 123743 + ... + 123908.

It is an arithmetic number, because the mean of its divisors is an integer number (5200692).

Almost surely, 2^20555033 is an apocalyptic number.

It is an amenable number.

20555033 is a deficient number, since it is larger than the sum of its proper divisors (247735).

20555033 is an equidigital number, since it uses as much as digits as its factorization.

20555033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247734.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 20555033 is about 4533.7658739728. The cubic root of 20555033 is about 273.9298708761.

The spelling of 20555033 in words is "twenty million, five hundred fifty-five thousand, thirty-three".