20985088 has 18 divisors (see below), whose sum is σ = 41888714. Its totient is φ = 10492416.

The previous prime is 20985059. The next prime is 20985113. The reversal of 20985088 is 88058902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14992384 + 5992704 = 3872^2 + 2448^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20985088.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40731 + ... + 41242.

Almost surely, 2^20985088 is an apocalyptic number.

It is an amenable number.

20985088 is a deficient number, since it is larger than the sum of its proper divisors (20903626).

20985088 is an frugal number, since it uses more digits than its factorization.

20985088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81989 (or 81975 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 20985088 is about 4580.9483734266. The cubic root of 20985088 is about 275.8270988775.

The spelling of 20985088 in words is "twenty million, nine hundred eighty-five thousand, eighty-eight".