20190688 has 48 divisors (see below), whose sum is σ = 47416320. Its totient is φ = 8274816.

The previous prime is 20190631. The next prime is 20190719. The reversal of 20190688 is 88609102.

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, 3193 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^20190688 is an apocalyptic number.

20190688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20190688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23708160).

20190688 is an abundant number, since it is smaller than the sum of its proper divisors (27225632).

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

20190688 is a wasteful number, since it uses less digits than its factorization.

20190688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959 (or 3951 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 20190688 is about 4493.4049450278. The cubic root of 20190688 is about 272.3017124951.

The spelling of 20190688 in words is "twenty million, one hundred ninety thousand, six hundred eighty-eight".