16652020 has 72 divisors (see below), whose sum is σ = 43972992. Its totient is φ = 5184960.

The previous prime is 16652011. The next prime is 16652029. The reversal of 16652020 is 2025661.

It is an interprime number because it is at equal distance from previous prime (16652011) and next prime (16652029).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 16651982 and 16652000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16652029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16449 + ... + 17431.

It is an arithmetic number, because the mean of its divisors is an integer number (610736).

Almost surely, 2^16652020 is an apocalyptic number.

16652020 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 16652020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21986496).

16652020 is an abundant number, since it is smaller than the sum of its proper divisors (27320972).

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

16652020 is a wasteful number, since it uses less digits than its factorization.

16652020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16652020 is about 4080.6886673698. The cubic root of 16652020 is about 255.3616296760.

Adding to 16652020 its reverse (2025661), we get a palindrome (18677681).

The spelling of 16652020 in words is "sixteen million, six hundred fifty-two thousand, twenty".