16820190 has 32 divisors (see below), whose sum is σ = 44854560. Its totient is φ = 4485312.

The previous prime is 16820189. The next prime is 16820233. The reversal of 16820190 is 9102861.

It is a super-2 number, since 2×16820190² = 565837583272200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 30879 + ... + 31418.

It is an arithmetic number, because the mean of its divisors is an integer number (1401705).

Almost surely, 2^16820190 is an apocalyptic number.

16820190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16820190 is an abundant number, since it is smaller than the sum of its proper divisors (28034370).

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

16820190 is a wasteful number, since it uses less digits than its factorization.

16820190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62313 (or 62307 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 16820190 is about 4101.2424946594. The cubic root of 16820190 is about 256.2183907074.

The spelling of 16820190 in words is "sixteen million, eight hundred twenty thousand, one hundred ninety".