20906488 has 16 divisors (see below), whose sum is σ = 39465000. Its totient is φ = 10382496.

The previous prime is 20906461. The next prime is 20906489. The reversal of 20906488 is 88460902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7578 + ... + 9961.

Almost surely, 2^20906488 is an apocalyptic number.

It is an amenable number.

20906488 is a deficient number, since it is larger than the sum of its proper divisors (18558512).

20906488 is a wasteful number, since it uses less digits than its factorization.

20906488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17694 (or 17690 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20906488 is about 4572.3613155568. The cubic root of 20906488 is about 275.4822963515.

The spelling of 20906488 in words is "twenty million, nine hundred six thousand, four hundred eighty-eight".