20355810048 has 216 divisors, whose sum is σ = 67216531200. Its totient is φ = 5803702272.

The previous prime is 20355810031. The next prime is 20355810067. The reversal of 20355810048 is 84001855302.

It is a happy number.

20355810048 is a `hidden beast` number, since 2 + 0 + 35 + 581 + 0 + 0 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20355809994 and 20355810021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9982213 + ... + 9984251.

Almost surely, 2^20355810048 is an apocalyptic number.

20355810048 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 20355810048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33608265600).

20355810048 is an abundant number, since it is smaller than the sum of its proper divisors (46860721152).

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

20355810048 is a wasteful number, since it uses less digits than its factorization.

20355810048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687 (or 2670 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 20355810048 in words is "twenty billion, three hundred fifty-five million, eight hundred ten thousand, forty-eight".