20648355 has 48 divisors (see below), whose sum is σ = 41406624. Its totient is φ = 8709120.

The previous prime is 20648333. The next prime is 20648357. The reversal of 20648355 is 55384602.

It is not a de Polignac number, because 20648355 - 2¹³ = 20640163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20648357) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8475 + ... + 10635.

It is an arithmetic number, because the mean of its divisors is an integer number (862638).

Almost surely, 2^20648355 is an apocalyptic number.

20648355 is an abundant number, since it is smaller than the sum of its proper divisors (20758269).

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

20648355 is a wasteful number, since it uses less digits than its factorization.

20648355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196 (or 2189 counting only the distinct ones).

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

The square root of 20648355 is about 4544.0461045196. The cubic root of 20648355 is about 274.3438018328.

The spelling of 20648355 in words is "twenty million, six hundred forty-eight thousand, three hundred fifty-five".