16201920 has 112 divisors (see below), whose sum is σ = 58814208. Its totient is φ = 3701760.

The previous prime is 16201909. The next prime is 16201937. The reversal of 16201920 is 2910261.

16201920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 5515 + ... + 7925.

Almost surely, 2^16201920 is an apocalyptic number.

16201920 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 16201920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29407104).

16201920 is an abundant number, since it is smaller than the sum of its proper divisors (42612288).

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

16201920 is a wasteful number, since it uses less digits than its factorization.

16201920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 16201920 is about 4025.1608663506. The cubic root of 16201920 is about 253.0397954346.

The spelling of 16201920 in words is "sixteen million, two hundred one thousand, nine hundred twenty".