20932688 has 40 divisors (see below), whose sum is σ = 47854080. Its totient is φ = 8680320.

The previous prime is 20932679. The next prime is 20932753. The reversal of 20932688 is 88623902.

It is a happy number.

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, 458 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (1196352).

Almost surely, 2^20932688 is an apocalyptic number.

20932688 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 20932688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23927040).

20932688 is an abundant number, since it is smaller than the sum of its proper divisors (26921392).

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

20932688 is a wasteful number, since it uses less digits than its factorization.

20932688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075 (or 6069 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20932688 is about 4575.2254589255. The cubic root of 20932688 is about 275.5973264037.

The spelling of 20932688 in words is "twenty million, nine hundred thirty-two thousand, six hundred eighty-eight".