20933688 has 16 divisors (see below), whose sum is σ = 52334280. Its totient is φ = 6977888.

The previous prime is 20933683. The next prime is 20933701. The reversal of 20933688 is 88633902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436095 + ... + 436142.

Almost surely, 2^20933688 is an apocalyptic number.

It is an amenable number.

20933688 is an abundant number, since it is smaller than the sum of its proper divisors (31400592).

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

20933688 is a wasteful number, since it uses less digits than its factorization.

20933688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872246 (or 872242 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20933688 is about 4575.3347418522. The cubic root of 20933688 is about 275.6017149616.

The spelling of 20933688 in words is "twenty million, nine hundred thirty-three thousand, six hundred eighty-eight".