13513020550 has 12 divisors (see below), whose sum is σ = 25134218316. Its totient is φ = 5405208200.

The previous prime is 13513020541. The next prime is 13513020553. The reversal of 13513020550 is 5502031531.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13513020553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135130156 + ... + 135130255.

It is an arithmetic number, because the mean of its divisors is an integer number (2094518193).

Almost surely, 2^13513020550 is an apocalyptic number.

13513020550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13513020550 is a deficient number, since it is larger than the sum of its proper divisors (11621197766).

13513020550 is a wasteful number, since it uses less digits than its factorization.

13513020550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270260423 (or 270260418 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The spelling of 13513020550 in words is "thirteen billion, five hundred thirteen million, twenty thousand, five hundred fifty".