20135144047540 has 48 divisors (see below), whose sum is σ = 42310679064192. Its totient is φ = 8048939124096.

The previous prime is 20135144047517. The next prime is 20135144047559. The reversal of 20135144047540 is 4574044153102.

It is a junction number, because it is equal to n+sod(n) for n = 20135144047493 and 20135144047502.

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, 554562067 + ... + 554598373.

It is an arithmetic number, because the mean of its divisors is an integer number (881472480504).

Almost surely, 2^{20135144047540} is an apocalyptic number.

20135144047540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20135144047540 is an abundant number, since it is smaller than the sum of its proper divisors (22175535016652).

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

20135144047540 is a wasteful number, since it uses less digits than its factorization.

20135144047540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53176 (or 53174 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

The spelling of 20135144047540 in words is "twenty trillion, one hundred thirty-five billion, one hundred forty-four million, forty-seven thousand, five hundred forty".