19704420 has 36 divisors (see below), whose sum is σ = 59770620. Its totient is φ = 5254464.

The previous prime is 19704389. The next prime is 19704439. The reversal of 19704420 is 2440791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12446784 + 7257636 = 3528^2 + 2694^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54555 + ... + 54914.

It is an arithmetic number, because the mean of its divisors is an integer number (1660295).

Almost surely, 2^19704420 is an apocalyptic number.

19704420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19704420 is an abundant number, since it is smaller than the sum of its proper divisors (40066200).

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

19704420 is a wasteful number, since it uses less digits than its factorization.

19704420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109484 (or 109479 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 19704420 is about 4438.9660958381. The cubic root of 19704420 is about 270.0979068797.

The spelling of 19704420 in words is "nineteen million, seven hundred four thousand, four hundred twenty".