16819020 has 144 divisors (see below), whose sum is σ = 54486432. Its totient is φ = 4193280.

The previous prime is 16819013. The next prime is 16819051. The reversal of 16819020 is 2091861.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317314 + ... + 317366.

It is an arithmetic number, because the mean of its divisors is an integer number (378378).

Almost surely, 2^16819020 is an apocalyptic number.

16819020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16819020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27243216).

16819020 is an abundant number, since it is smaller than the sum of its proper divisors (37667412).

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

16819020 is a wasteful number, since it uses less digits than its factorization.

16819020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 147 counting only the distinct ones).

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

The square root of 16819020 is about 4101.0998524786. The cubic root of 16819020 is about 256.2124497823.

It can be divided in two parts, 1681 and 9020, that added together give a palindrome (10701).

The spelling of 16819020 in words is "sixteen million, eight hundred nineteen thousand, twenty".