20302543520 has 48 divisors (see below), whose sum is σ = 54816870528. Its totient is φ = 6960871680.

The previous prime is 20302543511. The next prime is 20302543523. The reversal of 20302543520 is 2534520302.

It is a self number, because there is not a number n which added to its sum of digits gives 20302543520.

It is not an unprimeable number, because it can be changed into a prime (20302543523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9062516 + ... + 9064755.

It is an arithmetic number, because the mean of its divisors is an integer number (1142018136).

Almost surely, 2^20302543520 is an apocalyptic number.

20302543520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20302543520 is an abundant number, since it is smaller than the sum of its proper divisors (34514327008).

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

20302543520 is a wasteful number, since it uses less digits than its factorization.

20302543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18127293 (or 18127285 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The spelling of 20302543520 in words is "twenty billion, three hundred two million, five hundred forty-three thousand, five hundred twenty".