20168704 has 30 divisors (see below), whose sum is σ = 40368944. Its totient is φ = 10076160.

The previous prime is 20168699. The next prime is 20168711. The reversal of 20168704 is 40786102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15769 + ... + 16999.

Almost surely, 2^20168704 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 20168704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20184472).

20168704 is an abundant number, since it is smaller than the sum of its proper divisors (20200240).

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

20168704 is an frugal number, since it uses more digits than its factorization.

20168704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1233 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20168704 is about 4490.9580269693. The cubic root of 20168704 is about 272.2028475328.

The spelling of 20168704 in words is "twenty million, one hundred sixty-eight thousand, seven hundred four".