20351660353040 has 20 divisors (see below), whose sum is σ = 47317610321004. Its totient is φ = 8140664141184.

The previous prime is 20351660352997. The next prime is 20351660353061. The reversal of 20351660353040 is 4035306615302.

It can be written as a sum of positive squares in 2 ways, for example, as 4446750647824 + 15904909705216 = 2108732^2 + 3988096^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20351660352985 and 20351660353003.

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, 127197877127 + ... + 127197877286.

Almost surely, 2^{20351660353040} is an apocalyptic number.

20351660353040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20351660353040 is an abundant number, since it is smaller than the sum of its proper divisors (26965949967964).

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

20351660353040 is a wasteful number, since it uses less digits than its factorization.

20351660353040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254395754426 (or 254395754420 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 20351660353040 its reverse (4035306615302), we get a palindrome (24386966968342).

The spelling of 20351660353040 in words is "twenty trillion, three hundred fifty-one billion, six hundred sixty million, three hundred fifty-three thousand, forty".