16945020 has 72 divisors (see below), whose sum is σ = 53647776. Its totient is φ = 4321152.

The previous prime is 16944973. The next prime is 16945021. The reversal of 16945020 is 2054961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16945021) 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, 2094 + ... + 6186.

It is an arithmetic number, because the mean of its divisors is an integer number (745108).

Almost surely, 2^16945020 is an apocalyptic number.

16945020 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 16945020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26823888).

16945020 is an abundant number, since it is smaller than the sum of its proper divisors (36702756).

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

16945020 is a wasteful number, since it uses less digits than its factorization.

16945020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 16945020 is about 4116.4329218390. The cubic root of 16945020 is about 256.8506654626.

Adding to 16945020 its reverse (2054961), we get a palindrome (18999981).

The spelling of 16945020 in words is "sixteen million, nine hundred forty-five thousand, twenty".