20033001 has 20 divisors (see below), whose sum is σ = 30213700. Its totient is φ = 13226976.

The previous prime is 20032967. The next prime is 20033009. The reversal of 20033001 is 10033002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 13682601 = 2520^2 + 3699^2 .

It is not a de Polignac number, because 20033001 - 2⁶ = 20032937 is a prime.

It is a super-2 number, since 2×20033001² = 802642258132002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20033009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7695 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (1510685).

Almost surely, 2^20033001 is an apocalyptic number.

It is an amenable number.

20033001 is a deficient number, since it is larger than the sum of its proper divisors (10180699).

20033001 is a wasteful number, since it uses less digits than its factorization.

20033001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390 (or 2381 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 20033001 is about 4475.8240582043. The cubic root of 20033001 is about 271.5909771115.

Adding to 20033001 its reverse (10033002), we get a palindrome (30066003).

Subtracting from 20033001 its reverse (10033002), we obtain a palindrome (9999999).

The spelling of 20033001 in words is "twenty million, thirty-three thousand, one".