20020830 has 16 divisors (see below), whose sum is σ = 48050064. Its totient is φ = 5338880.

The previous prime is 20020829. The next prime is 20020841. The reversal of 20020830 is 3802002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333651 + ... + 333710.

It is an arithmetic number, because the mean of its divisors is an integer number (3003129).

Almost surely, 2^20020830 is an apocalyptic number.

20020830 is an abundant number, since it is smaller than the sum of its proper divisors (28029234).

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

20020830 is a wasteful number, since it uses less digits than its factorization.

20020830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667371.

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

The square root of 20020830 is about 4474.4642137355. The cubic root of 20020830 is about 271.5359644946.

Adding to 20020830 its reverse (3802002), we get a palindrome (23822832).

The spelling of 20020830 in words is "twenty million, twenty thousand, eight hundred thirty".