20203668 has 60 divisors (see below), whose sum is σ = 53340672. Its totient is φ = 6667920.

The previous prime is 20203657. The next prime is 20203709. The reversal of 20203668 is 86630202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40903 + ... + 41393.

Almost surely, 2^20203668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26670336).

20203668 is an abundant number, since it is smaller than the sum of its proper divisors (33137004).

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

20203668 is a wasteful number, since it uses less digits than its factorization.

20203668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20203668 is about 4494.8490519705. The cubic root of 20203668 is about 272.3600515851.

The spelling of 20203668 in words is "twenty million, two hundred three thousand, six hundred sixty-eight".