20304474735560 has 16 divisors (see below), whose sum is σ = 45685068155100. Its totient is φ = 8121789894208.

The previous prime is 20304474735557. The next prime is 20304474735631. The reversal of 20304474735560 is 6553747440302.

It can be written as a sum of positive squares in 2 ways, for example, as 20255742407044 + 48732328516 = 4500638^2 + 220754^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20304474735499 and 20304474735508.

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, 253805934155 + ... + 253805934234.

Almost surely, 2^{20304474735560} is an apocalyptic number.

20304474735560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20304474735560 is an abundant number, since it is smaller than the sum of its proper divisors (25380593419540).

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

20304474735560 is a wasteful number, since it uses less digits than its factorization.

20304474735560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507611868400 (or 507611868396 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 50.

The spelling of 20304474735560 in words is "twenty trillion, three hundred four billion, four hundred seventy-four million, seven hundred thirty-five thousand, five hundred sixty".