16819990 has 16 divisors (see below), whose sum is σ = 33028560. Its totient is φ = 6116320.

The previous prime is 16819981. The next prime is 16819991. The reversal of 16819990 is 9991861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16819991) 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, 76345 + ... + 76564.

It is an arithmetic number, because the mean of its divisors is an integer number (2064285).

Almost surely, 2^16819990 is an apocalyptic number.

16819990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16819990 is a deficient number, since it is larger than the sum of its proper divisors (16208570).

16819990 is a wasteful number, since it uses less digits than its factorization.

16819990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152927.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 16819990 is about 4101.2181117322. The cubic root of 16819990 is about 256.2173751842.

The spelling of 16819990 in words is "sixteen million, eight hundred nineteen thousand, nine hundred ninety".