19807044 has 48 divisors (see below), whose sum is σ = 49156800. Its totient is φ = 6189696.

The previous prime is 19807043. The next prime is 19807103. The reversal of 19807044 is 44070891.

It is a junction number, because it is equal to n+sod(n) for n = 19806996 and 19807014.

It is not an unprimeable number, because it can be changed into a prime (19807043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24454 + ... + 25250.

It is an arithmetic number, because the mean of its divisors is an integer number (1024100).

Almost surely, 2^19807044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19807044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24578400).

19807044 is an abundant number, since it is smaller than the sum of its proper divisors (29349756).

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

19807044 is a wasteful number, since it uses less digits than its factorization.

19807044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 19807044 is about 4450.5105325120. The cubic root of 19807044 is about 270.5660005934.

The spelling of 19807044 in words is "nineteen million, eight hundred seven thousand, forty-four".