19540416 has 168 divisors, whose sum is σ = 63008256. Its totient is φ = 5322240.

The previous prime is 19540399. The next prime is 19540427. The reversal of 19540416 is 61404591.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291615 + ... + 291681.

Almost surely, 2^19540416 is an apocalyptic number.

19540416 is a gapful number since it is divisible by the number (16) 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 19540416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31504128).

19540416 is an abundant number, since it is smaller than the sum of its proper divisors (43467840).

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

19540416 is a wasteful number, since it uses less digits than its factorization.

19540416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 19540416 is about 4420.4542752980. The cubic root of 19540416 is about 269.3464577687.

The spelling of 19540416 in words is "nineteen million, five hundred forty thousand, four hundred sixteen".