20898648 has 40 divisors (see below), whose sum is σ = 58537380. Its totient is φ = 6966000.

The previous prime is 20898629. The next prime is 20898649. The reversal of 20898648 is 84689802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20898649) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15478 + ... + 16773.

Almost surely, 2^20898648 is an apocalyptic number.

It is an amenable number.

20898648 is an abundant number, since it is smaller than the sum of its proper divisors (37638732).

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

20898648 is a wasteful number, since it uses less digits than its factorization.

20898648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32269 (or 32256 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 20898648 is about 4571.5039100935. The cubic root of 20898648 is about 275.4478564648.

The spelling of 20898648 in words is "twenty million, eight hundred ninety-eight thousand, six hundred forty-eight".