20618448 has 20 divisors (see below), whose sum is σ = 53264448. Its totient is φ = 6872800.

The previous prime is 20618407. The next prime is 20618453. The reversal of 20618448 is 84481602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214728 + ... + 214823.

Almost surely, 2^20618448 is an apocalyptic number.

It is an amenable number.

20618448 is an abundant number, since it is smaller than the sum of its proper divisors (32646000).

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

20618448 is a wasteful number, since it uses less digits than its factorization.

20618448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429562 (or 429556 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 20618448 is about 4540.7541223898. The cubic root of 20618448 is about 274.2112849885.

The spelling of 20618448 in words is "twenty million, six hundred eighteen thousand, four hundred forty-eight".