16381630 has 16 divisors (see below), whose sum is σ = 29592864. Its totient is φ = 6529120.

The previous prime is 16381621. The next prime is 16381633. The reversal of 16381630 is 3618361.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 5725.

It is an arithmetic number, because the mean of its divisors is an integer number (1849554).

Almost surely, 2^16381630 is an apocalyptic number.

16381630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16381630 is a deficient number, since it is larger than the sum of its proper divisors (13211234).

16381630 is a wasteful number, since it uses less digits than its factorization.

16381630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16381630 is about 4047.4226366912. The cubic root of 16381630 is about 253.9719211733.

Adding to 16381630 its reverse (3618361), we get a palindrome (19999991).

The spelling of 16381630 in words is "sixteen million, three hundred eighty-one thousand, six hundred thirty".