16381970 has 16 divisors (see below), whose sum is σ = 32168448. Its totient is φ = 5957040.

The previous prime is 16381961. The next prime is 16381979. The reversal of 16381970 is 7918361.

It is an interprime number because it is at equal distance from previous prime (16381961) and next prime (16381979).

It is a self number, because there is not a number n which added to its sum of digits gives 16381970.

It is not an unprimeable number, because it can be changed into a prime (16381979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74354 + ... + 74573.

It is an arithmetic number, because the mean of its divisors is an integer number (2010528).

Almost surely, 2^16381970 is an apocalyptic number.

16381970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16381970 is a deficient number, since it is larger than the sum of its proper divisors (15786478).

16381970 is a wasteful number, since it uses less digits than its factorization.

16381970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148945.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 16381970 is about 4047.4646385114. The cubic root of 16381970 is about 253.9736782198.

The spelling of 16381970 in words is "sixteen million, three hundred eighty-one thousand, nine hundred seventy".