19864452 has 48 divisors (see below), whose sum is σ = 47944512. Its totient is φ = 6397440.

The previous prime is 19864441. The next prime is 19864457. The reversal of 19864452 is 25446891.

It is a self number, because there is not a number n which added to its sum of digits gives 19864452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19864457) 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, 70552 + ... + 70832.

It is an arithmetic number, because the mean of its divisors is an integer number (998844).

Almost surely, 2^19864452 is an apocalyptic number.

19864452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19864452 is an abundant number, since it is smaller than the sum of its proper divisors (28080060).

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

19864452 is a wasteful number, since it uses less digits than its factorization.

19864452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 466 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 19864452 is about 4456.9554630936. The cubic root of 19864452 is about 270.8271479350.

The spelling of 19864452 in words is "nineteen million, eight hundred sixty-four thousand, four hundred fifty-two".