13920012 has 36 divisors (see below), whose sum is σ = 36492456. Its totient is φ = 4639680.

The previous prime is 13919993. The next prime is 13920019. The reversal of 13920012 is 21002931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13920019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6189 + ... + 8132.

Almost surely, 2^13920012 is an apocalyptic number.

13920012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13920012 is an abundant number, since it is smaller than the sum of its proper divisors (22572444).

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

13920012 is a wasteful number, since it uses less digits than its factorization.

13920012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14340 (or 14326 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 13920012 is about 3730.9532294040. The cubic root of 13920012 is about 240.5543436107.

Adding to 13920012 its reverse (21002931), we get a palindrome (34922943).

The spelling of 13920012 in words is "thirteen million, nine hundred twenty thousand, twelve".