19865652 has 48 divisors (see below), whose sum is σ = 48771072. Its totient is φ = 6281440.

The previous prime is 19865617. The next prime is 19865653. The reversal of 19865652 is 25656891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19865653) 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, 45877 + ... + 46307.

It is an arithmetic number, because the mean of its divisors is an integer number (1016064).

Almost surely, 2^19865652 is an apocalyptic number.

19865652 is a gapful number since it is divisible by the number (12) 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 19865652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24385536).

19865652 is an abundant number, since it is smaller than the sum of its proper divisors (28905420).

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

19865652 is a wasteful number, since it uses less digits than its factorization.

19865652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 626 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 19865652 is about 4457.0900821051. The cubic root of 19865652 is about 270.8326013287.

The spelling of 19865652 in words is "nineteen million, eight hundred sixty-five thousand, six hundred fifty-two".