20265648 has 80 divisors (see below), whose sum is σ = 57662976. Its totient is φ = 6094080.

The previous prime is 20265629. The next prime is 20265667. The reversal of 20265648 is 84656202.

It is an interprime number because it is at equal distance from previous prime (20265629) and next prime (20265667).

It is a super-3 number, since 3×20265648³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28983 + ... + 29673.

Almost surely, 2^20265648 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 20265648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28831488).

20265648 is an abundant number, since it is smaller than the sum of its proper divisors (37397328).

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

20265648 is a wasteful number, since it uses less digits than its factorization.

20265648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 20265648 is about 4501.7383309117. The cubic root of 20265648 is about 272.6382790040.

The spelling of 20265648 in words is "twenty million, two hundred sixty-five thousand, six hundred forty-eight".