20003055 has 8 divisors (see below), whose sum is σ = 32004912. Its totient is φ = 10668288.

The previous prime is 20003047. The next prime is 20003057. The reversal of 20003055 is 55030002.

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

It is not a de Polignac number, because 20003055 - 2³ = 20003047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1333537 = 20003055 / (2 + 0 + 0 + 0 + 3 + 0 + 5 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003057) 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, 666754 + ... + 666783.

It is an arithmetic number, because the mean of its divisors is an integer number (4000614).

Almost surely, 2^20003055 is an apocalyptic number.

20003055 is a deficient number, since it is larger than the sum of its proper divisors (12001857).

20003055 is a wasteful number, since it uses less digits than its factorization.

20003055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333545.

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 20003055 is about 4472.4775013408. The cubic root of 20003055 is about 271.4555818655.

Adding to 20003055 its reverse (55030002), we get a palindrome (75033057).

The spelling of 20003055 in words is "twenty million, three thousand, fifty-five".