20368680 has 64 divisors (see below), whose sum is σ = 61430400. Its totient is φ = 5402880.

The previous prime is 20368661. The next prime is 20368723. The reversal of 20368680 is 8686302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31965 + ... + 32595.

It is an arithmetic number, because the mean of its divisors is an integer number (959850).

Almost surely, 2^20368680 is an apocalyptic number.

20368680 is a gapful number since it is divisible by the number (20) 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 20368680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30715200).

20368680 is an abundant number, since it is smaller than the sum of its proper divisors (41061720).

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

20368680 is a wasteful number, since it uses less digits than its factorization.

20368680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20368680 is about 4513.1674021689. The cubic root of 20368680 is about 273.0995356836.

The spelling of 20368680 in words is "twenty million, three hundred sixty-eight thousand, six hundred eighty".