20803775540 has 48 divisors (see below), whose sum is σ = 45601194240. Its totient is φ = 7957297920.

The previous prime is 20803775539. The next prime is 20803775611. The reversal of 20803775540 is 4557730802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2567816 + ... + 2575904.

It is an arithmetic number, because the mean of its divisors is an integer number (950024880).

Almost surely, 2^20803775540 is an apocalyptic number.

20803775540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20803775540 is an abundant number, since it is smaller than the sum of its proper divisors (24797418700).

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

20803775540 is a wasteful number, since it uses less digits than its factorization.

20803775540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13712 (or 13710 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 20803775540 in words is "twenty billion, eight hundred three million, seven hundred seventy-five thousand, five hundred forty".