16505412 has 48 divisors (see below), whose sum is σ = 48018432. Its totient is φ = 4286880.

The previous prime is 16505407. The next prime is 16505417. The reversal of 16505412 is 21450561.

It is an interprime number because it is at equal distance from previous prime (16505407) and next prime (16505417).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16505417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8008 + ... + 9855.

It is an arithmetic number, because the mean of its divisors is an integer number (1000384).

Almost surely, 2^16505412 is an apocalyptic number.

16505412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16505412 is an abundant number, since it is smaller than the sum of its proper divisors (31513020).

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

16505412 is a wasteful number, since it uses less digits than its factorization.

16505412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17888 (or 17886 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 16505412 is about 4062.6853188501. The cubic root of 16505412 is about 254.6099997574.

Adding to 16505412 its reverse (21450561), we get a palindrome (37955973).

The spelling of 16505412 in words is "sixteen million, five hundred five thousand, four hundred twelve".