20030646 has 8 divisors (see below), whose sum is σ = 40061304. Its totient is φ = 6676880.

The previous prime is 20030629. The next prime is 20030657. The reversal of 20030646 is 64603002.

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

20030646 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669215 + ... + 1669226.

It is an arithmetic number, because the mean of its divisors is an integer number (5007663).

Almost surely, 2^20030646 is an apocalyptic number.

20030646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20030646 is a wasteful number, since it uses less digits than its factorization.

20030646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338446.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20030646 is about 4475.5609704259. The cubic root of 20030646 is about 271.5803343091.

Adding to 20030646 its reverse (64603002), we get a palindrome (84633648).

The spelling of 20030646 in words is "twenty million, thirty thousand, six hundred forty-six".