16419820 has 12 divisors (see below), whose sum is σ = 34481664. Its totient is φ = 6567920.

The previous prime is 16419811. The next prime is 16419827. The reversal of 16419820 is 2891461.

It is a happy number.

It is a super-2 number, since 2×16419820² = 539220977664800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16419827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410476 + ... + 410515.

It is an arithmetic number, because the mean of its divisors is an integer number (2873472).

Almost surely, 2^16419820 is an apocalyptic number.

16419820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16419820 is an abundant number, since it is smaller than the sum of its proper divisors (18061844).

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

16419820 is a wasteful number, since it uses less digits than its factorization.

16419820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821000 (or 820998 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 16419820 is about 4052.1377074330. The cubic root of 16419820 is about 254.1691270328.

The spelling of 16419820 in words is "sixteen million, four hundred nineteen thousand, eight hundred twenty".