16219994 has 16 divisors (see below), whose sum is σ = 28083456. Its totient is φ = 6882000.

The previous prime is 16219981. The next prime is 16220069. The reversal of 16219994 is 49991261.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322 + ... + 7149.

It is an arithmetic number, because the mean of its divisors is an integer number (1755216).

Almost surely, 2^16219994 is an apocalyptic number.

16219994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16219994 is a deficient number, since it is larger than the sum of its proper divisors (11863462).

16219994 is a wasteful number, since it uses less digits than its factorization.

16219994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581.

The product of its digits is 34992, while the sum is 41.

The square root of 16219994 is about 4027.4053682241. The cubic root of 16219994 is about 253.1338530460.

The spelling of 16219994 in words is "sixteen million, two hundred nineteen thousand, nine hundred ninety-four".