16431012 has 120 divisors (see below), whose sum is σ = 47811456. Its totient is φ = 4888512.

The previous prime is 16430989. The next prime is 16431017. The reversal of 16431012 is 21013461.

It is a happy number.

16431012 is a `hidden beast` number, since 1 + 643 + 10 + 12 = 666.

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 (16431017) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 197923 + ... + 198005.

Almost surely, 2^16431012 is an apocalyptic number.

16431012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16431012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23905728).

16431012 is an abundant number, since it is smaller than the sum of its proper divisors (31380444).

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

16431012 is a wasteful number, since it uses less digits than its factorization.

16431012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16431012 is about 4053.5184716490. The cubic root of 16431012 is about 254.2268624362.

Adding to 16431012 its reverse (21013461), we get a palindrome (37444473).

The spelling of 16431012 in words is "sixteen million, four hundred thirty-one thousand, twelve".