20265057648 has 60 divisors (see below), whose sum is σ = 61869839928. Its totient is φ = 6140926080.

The previous prime is 20265057623. The next prime is 20265057713. The reversal of 20265057648 is 84675056202.

20265057648 is a `hidden beast` number, since 2 + 0 + 26 + 50 + 576 + 4 + 8 = 666.

It is a super-2 number, since 2×20265057648² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6395215 + ... + 6398382.

Almost surely, 2^20265057648 is an apocalyptic number.

It is an amenable number.

20265057648 is an abundant number, since it is smaller than the sum of its proper divisors (41604782280).

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

20265057648 is a wasteful number, since it uses less digits than its factorization.

20265057648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12793622 (or 12793613 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 20265057648 in words is "twenty billion, two hundred sixty-five million, fifty-seven thousand, six hundred forty-eight".