20513362020040 has 64 divisors (see below), whose sum is σ = 48907461484800. Its totient is φ = 7716768427008.

The previous prime is 20513362019933. The next prime is 20513362020059. The reversal of 20513362020040 is 4002026331502.

It is a junction number, because it is equal to n+sod(n) for n = 20513362019990 and 20513362020008.

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, 10651680 + ... + 12429199.

It is an arithmetic number, because the mean of its divisors is an integer number (764179085700).

Almost surely, 2^{20513362020040} is an apocalyptic number.

20513362020040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20513362020040 is an abundant number, since it is smaller than the sum of its proper divisors (28394099464760).

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

20513362020040 is a wasteful number, since it uses less digits than its factorization.

20513362020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23082214 (or 23082210 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20513362020040 its reverse (4002026331502), we get a palindrome (24515388351542).

The spelling of 20513362020040 in words is "twenty trillion, five hundred thirteen billion, three hundred sixty-two million, twenty thousand, forty".