19145456 has 40 divisors (see below), whose sum is σ = 40757808. Its totient is φ = 8640000.

The previous prime is 19145429. The next prime is 19145473. The reversal of 19145456 is 65454191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31556 + ... + 32156.

Almost surely, 2^19145456 is an apocalyptic number.

19145456 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 19145456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20378904).

19145456 is an abundant number, since it is smaller than the sum of its proper divisors (21612352).

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

19145456 is a wasteful number, since it uses less digits than its factorization.

19145456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 795 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 19145456 is about 4375.5520794524. The cubic root of 19145456 is about 267.5193732148.

The spelling of 19145456 in words is "nineteen million, one hundred forty-five thousand, four hundred fifty-six".