20168688 has 40 divisors (see below), whose sum is σ = 53902800. Its totient is φ = 6490624.

The previous prime is 20168683. The next prime is 20168689. The reversal of 20168688 is 88686102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5853 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (1347570).

Almost surely, 2^20168688 is an apocalyptic number.

It is an amenable number.

20168688 is an abundant number, since it is smaller than the sum of its proper divisors (33734112).

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

20168688 is a wasteful number, since it uses less digits than its factorization.

20168688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14529 (or 14523 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 20168688 is about 4490.9562456118. The cubic root of 20168688 is about 272.2027755525.

The spelling of 20168688 in words is "twenty million, one hundred sixty-eight thousand, six hundred eighty-eight".