20002830 has 32 divisors (see below), whose sum is σ = 48688128. Its totient is φ = 5258400.

The previous prime is 20002823. The next prime is 20002831. The reversal of 20002830 is 3820002.

It is a super-2 number, since 2×20002830² = 800226416017800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (1521504).

Almost surely, 2^20002830 is an apocalyptic number.

20002830 is an abundant number, since it is smaller than the sum of its proper divisors (28685298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002830 is a wasteful number, since it uses less digits than its factorization.

20002830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9472.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20002830 is about 4472.4523474264. The cubic root of 20002830 is about 271.4545640588.

Adding to 20002830 its reverse (3820002), we get a palindrome (23822832).

The spelling of 20002830 in words is "twenty million, two thousand, eight hundred thirty".