13521671850 has 24 divisors (see below), whose sum is σ = 33533746560. Its totient is φ = 3605779120.

The previous prime is 13521671827. The next prime is 13521671851. The reversal of 13521671850 is 5817612531.

It is a junction number, because it is equal to n+sod(n) for n = 13521671799 and 13521671808.

It is not an unprimeable number, because it can be changed into a prime (13521671851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45072090 + ... + 45072389.

It is an arithmetic number, because the mean of its divisors is an integer number (1397239440).

Almost surely, 2^13521671850 is an apocalyptic number.

13521671850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13521671850 is an abundant number, since it is smaller than the sum of its proper divisors (20012074710).

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

13521671850 is a wasteful number, since it uses less digits than its factorization.

13521671850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90144494 (or 90144489 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 13521671850 in words is "thirteen billion, five hundred twenty-one million, six hundred seventy-one thousand, eight hundred fifty".