20551033 has 8 divisors (see below), whose sum is σ = 21320288. Its totient is φ = 19795104.

The previous prime is 20551019. The next prime is 20551043. The reversal of 20551033 is 33015502.

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 20551033 - 2⁵ = 20551001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20551033.

It is not an unprimeable number, because it can be changed into a prime (20551043) 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, 135 + ... + 6412.

It is an arithmetic number, because the mean of its divisors is an integer number (2665036).

Almost surely, 2^20551033 is an apocalyptic number.

It is an amenable number.

20551033 is a deficient number, since it is larger than the sum of its proper divisors (769255).

20551033 is an equidigital number, since it uses as much as digits as its factorization.

20551033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20551033 is about 4533.3247181291. The cubic root of 20551033 is about 273.9121008476.

Adding to 20551033 its reverse (33015502), we get a palindrome (53566535).

The spelling of 20551033 in words is "twenty million, five hundred fifty-one thousand, thirty-three".