20013725757550 has 24 divisors (see below), whose sum is σ = 42543462753936. Its totient is φ = 6861848831040.

The previous prime is 20013725757521. The next prime is 20013725757587. The reversal of 20013725757550 is 5575752731002.

It is a junction number, because it is equal to n+sod(n) for n = 20013725757494 and 20013725757503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28591036447 + ... + 28591037146.

It is an arithmetic number, because the mean of its divisors is an integer number (1772644281414).

Almost surely, 2^{20013725757550} is an apocalyptic number.

20013725757550 is an abundant number, since it is smaller than the sum of its proper divisors (22529736996386).

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

20013725757550 is a wasteful number, since it uses less digits than its factorization.

20013725757550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57182073612 (or 57182073607 counting only the distinct ones).

The product of its (nonzero) digits is 2572500, while the sum is 49.

The spelling of 20013725757550 in words is "twenty trillion, thirteen billion, seven hundred twenty-five million, seven hundred fifty-seven thousand, five hundred fifty".