16513940 has 12 divisors (see below), whose sum is σ = 34679316. Its totient is φ = 6605568.

The previous prime is 16513879. The next prime is 16513943. The reversal of 16513940 is 4931561.

It can be written as a sum of positive squares in 2 ways, for example, as 1752976 + 14760964 = 1324^2 + 3842^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16513943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412829 + ... + 412868.

It is an arithmetic number, because the mean of its divisors is an integer number (2889943).

Almost surely, 2^16513940 is an apocalyptic number.

16513940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16513940 is an abundant number, since it is smaller than the sum of its proper divisors (18165376).

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

16513940 is a wasteful number, since it uses less digits than its factorization.

16513940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825706 (or 825704 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 16513940 is about 4063.7347354373. The cubic root of 16513940 is about 254.6538427552.

The spelling of 16513940 in words is "sixteen million, five hundred thirteen thousand, nine hundred forty".