20650448 has 60 divisors (see below), whose sum is σ = 49559328. Its totient is φ = 8161920.

The previous prime is 20650439. The next prime is 20650451. The reversal of 20650448 is 84405602.

It is a self number, because there is not a number n which added to its sum of digits gives 20650448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18383 + ... + 19473.

Almost surely, 2^20650448 is an apocalyptic number.

20650448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20650448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24779664).

20650448 is an abundant number, since it is smaller than the sum of its proper divisors (28908880).

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

20650448 is a wasteful number, since it uses less digits than its factorization.

20650448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 20650448 is about 4544.2764000443. The cubic root of 20650448 is about 274.3530710487.

The spelling of 20650448 in words is "twenty million, six hundred fifty thousand, four hundred forty-eight".