13946321520 has 60 divisors (see below), whose sum is σ = 46836398856. Its totient is φ = 3719018880.

The previous prime is 13946321507. The next prime is 13946321527. The reversal of 13946321520 is 2512364931.

13946321520 is a `hidden beast` number, since 1 + 3 + 9 + 4 + 632 + 15 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×13946321520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13946321527) 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, 9684226 + ... + 9685665.

Almost surely, 2^13946321520 is an apocalyptic number.

13946321520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13946321520 is an abundant number, since it is smaller than the sum of its proper divisors (32890077336).

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

13946321520 is a wasteful number, since it uses less digits than its factorization.

13946321520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19369910 (or 19369901 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 13946321520 in words is "thirteen billion, nine hundred forty-six million, three hundred twenty-one thousand, five hundred twenty".