20549682320 has 20 divisors (see below), whose sum is σ = 47778011580. Its totient is φ = 8219872896.

The previous prime is 20549682311. The next prime is 20549682341. The reversal of 20549682320 is 2328694502.

It can be written as a sum of positive squares in 2 ways, for example, as 2831942656 + 17717739664 = 53216^2 + 133108^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128435435 + ... + 128435594.

It is an arithmetic number, because the mean of its divisors is an integer number (2388900579).

Almost surely, 2^20549682320 is an apocalyptic number.

20549682320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20549682320 is an abundant number, since it is smaller than the sum of its proper divisors (27228329260).

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

20549682320 is a wasteful number, since it uses less digits than its factorization.

20549682320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256871042 (or 256871036 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 20549682320 in words is "twenty billion, five hundred forty-nine million, six hundred eighty-two thousand, three hundred twenty".