19745056 has 24 divisors (see below), whose sum is σ = 40215420. Its totient is φ = 9531648.

The previous prime is 19745051. The next prime is 19745069. The reversal of 19745056 is 65054791.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 1392400 = 4284^2 + 1180^2 .

It is not an unprimeable number, because it can be changed into a prime (19745051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9711 + ... + 11566.

Almost surely, 2^19745056 is an apocalyptic number.

19745056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19745056 is an abundant number, since it is smaller than the sum of its proper divisors (20470364).

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

19745056 is a wasteful number, since it uses less digits than its factorization.

19745056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21316 (or 21308 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 19745056 is about 4443.5409303842. The cubic root of 19745056 is about 270.2834517506.

It can be divided in two parts, 197450 and 56, that added together give a triangular number (197506 = T₆₂₈).

The spelling of 19745056 in words is "nineteen million, seven hundred forty-five thousand, fifty-six".