13949215920 has 60 divisors (see below), whose sum is σ = 46846119216. Its totient is φ = 3719790720.

The previous prime is 13949215919. The next prime is 13949215933. The reversal of 13949215920 is 2951294931.

13949215920 is a `hidden beast` number, since 1 + 3 + 9 + 492 + 159 + 2 + 0 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 9686236 + ... + 9687675.

Almost surely, 2^13949215920 is an apocalyptic number.

13949215920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13949215920 is an abundant number, since it is smaller than the sum of its proper divisors (32896903296).

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

13949215920 is a wasteful number, since it uses less digits than its factorization.

13949215920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19373930 (or 19373921 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 13949215920 in words is "thirteen billion, nine hundred forty-nine million, two hundred fifteen thousand, nine hundred twenty".