20553648 has 80 divisors (see below), whose sum is σ = 55639296. Its totient is φ = 6531840.

The previous prime is 20553647. The next prime is 20553691. The reversal of 20553648 is 84635502.

It is a super-2 number, since 2×20553648² = 844904892215808, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20553647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126015 + ... + 126177.

Almost surely, 2^20553648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20553648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27819648).

20553648 is an abundant number, since it is smaller than the sum of its proper divisors (35085648).

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

20553648 is a wasteful number, since it uses less digits than its factorization.

20553648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 20553648 is about 4533.6131286205. The cubic root of 20553648 is about 273.9237182646.

The spelling of 20553648 in words is "twenty million, five hundred fifty-three thousand, six hundred forty-eight".