20485543700 has 36 divisors (see below), whose sum is σ = 44472591072. Its totient is φ = 8190722400.

The previous prime is 20485543693. The next prime is 20485543723. The reversal of 20485543700 is 734558402.

It is a happy number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 198617 + ... + 283583.

It is an arithmetic number, because the mean of its divisors is an integer number (1235349752).

Almost surely, 2^20485543700 is an apocalyptic number.

20485543700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20485543700 is an abundant number, since it is smaller than the sum of its proper divisors (23987047372).

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

20485543700 is a wasteful number, since it uses less digits than its factorization.

20485543700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87392 (or 87385 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 20485543700 in words is "twenty billion, four hundred eighty-five million, five hundred forty-three thousand, seven hundred".