19836872 has 32 divisors (see below), whose sum is σ = 40841280. Its totient is φ = 8957760.

The previous prime is 19836871. The next prime is 19836877. The reversal of 19836872 is 27863891.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (19836871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14573 + ... + 15875.

It is an arithmetic number, because the mean of its divisors is an integer number (1276290).

Almost surely, 2^19836872 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 19836872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20420640).

19836872 is an abundant number, since it is smaller than the sum of its proper divisors (21004408).

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

19836872 is a wasteful number, since it uses less digits than its factorization.

19836872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1489 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 19836872 is about 4453.8603480576. The cubic root of 19836872 is about 270.7017501931.

The spelling of 19836872 in words is "nineteen million, eight hundred thirty-six thousand, eight hundred seventy-two".