16381963 has 8 divisors (see below), whose sum is σ = 17841600. Its totient is φ = 14950848.

The previous prime is 16381961. The next prime is 16381979. The reversal of 16381963 is 36918361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16381963 - 2¹ = 16381961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16381961) 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, 5923 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (2230200).

Almost surely, 2^16381963 is an apocalyptic number.

16381963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16381963 is a deficient number, since it is larger than the sum of its proper divisors (1459637).

16381963 is a wasteful number, since it uses less digits than its factorization.

16381963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261.

The product of its digits is 23328, while the sum is 37.

The square root of 16381963 is about 4047.4637737724. The cubic root of 16381963 is about 253.9736420455.

The spelling of 16381963 in words is "sixteen million, three hundred eighty-one thousand, nine hundred sixty-three".