16201994 has 16 divisors (see below), whose sum is σ = 24889032. Its totient is φ = 7907328.

The previous prime is 16201973. The next prime is 16202009. The reversal of 16201994 is 49910261.

It can be written as a sum of positive squares in 4 ways, for example, as 11812969 + 4389025 = 3437^2 + 2095^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16201994.

It is an unprimeable number.

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, 37202 + ... + 37634.

Almost surely, 2^16201994 is an apocalyptic number.

16201994 is a deficient number, since it is larger than the sum of its proper divisors (8687038).

16201994 is a wasteful number, since it uses less digits than its factorization.

16201994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 16201994 is about 4025.1700585193. The cubic root of 16201994 is about 253.0401806753.

The spelling of 16201994 in words is "sixteen million, two hundred one thousand, nine hundred ninety-four".