20648487357 has 24 divisors (see below), whose sum is σ = 31085745600. Its totient is φ = 13696452000.

The previous prime is 20648487323. The next prime is 20648487361. The reversal of 20648487357 is 75378484602.

20648487357 is a `hidden beast` number, since 206 + 4 + 8 + 4 + 87 + 357 = 666.

It is not a de Polignac number, because 20648487357 - 2¹⁰ = 20648486333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20648487157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165144 + ... + 261857.

It is an arithmetic number, because the mean of its divisors is an integer number (1295239400).

Almost surely, 2^20648487357 is an apocalyptic number.

20648487357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20648487357 is a deficient number, since it is larger than the sum of its proper divisors (10437258243).

20648487357 is an equidigital number, since it uses as much as digits as its factorization.

20648487357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427215 (or 427203 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 20648487357 in words is "twenty billion, six hundred forty-eight million, four hundred eighty-seven thousand, three hundred fifty-seven".