13505981124 has 12 divisors (see below), whose sum is σ = 31513955984. Its totient is φ = 4501993704.

The previous prime is 13505981119. The next prime is 13505981131. The reversal of 13505981124 is 42118950531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×13505981124² (a number of 21 digits) contains 22 as substring.

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, 562749202 + ... + 562749225.

Almost surely, 2^13505981124 is an apocalyptic number.

It is an amenable number.

13505981124 is an abundant number, since it is smaller than the sum of its proper divisors (18007974860).

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

13505981124 is a wasteful number, since it uses less digits than its factorization.

13505981124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125498434 (or 1125498432 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 13505981124 in words is "thirteen billion, five hundred five million, nine hundred eighty-one thousand, one hundred twenty-four".