16995420 has 144 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 4167936.

The previous prime is 16995397. The next prime is 16995437. The reversal of 16995420 is 2459961.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 63046 + ... + 63314.

It is an arithmetic number, because the mean of its divisors is an integer number (401310).

Almost surely, 2^16995420 is an apocalyptic number.

16995420 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 16995420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28894320).

16995420 is an abundant number, since it is smaller than the sum of its proper divisors (40793220).

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

16995420 is a wasteful number, since it uses less digits than its factorization.

16995420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 16995420 is about 4122.5501816230. The cubic root of 16995420 is about 257.1050658748.

The spelling of 16995420 in words is "sixteen million, nine hundred ninety-five thousand, four hundred twenty".