16919220 has 48 divisors (see below), whose sum is σ = 47557440. Its totient is φ = 4494336.

The previous prime is 16919197. The next prime is 16919239. The reversal of 16919220 is 2291961.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24804 + ... + 25476.

It is an arithmetic number, because the mean of its divisors is an integer number (990780).

Almost surely, 2^16919220 is an apocalyptic number.

16919220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16919220 is an abundant number, since it is smaller than the sum of its proper divisors (30638220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16919220 is a wasteful number, since it uses less digits than its factorization.

16919220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16919220 is about 4113.2979469034. The cubic root of 16919220 is about 256.7202414354.

The spelling of 16919220 in words is "sixteen million, nine hundred nineteen thousand, two hundred twenty".