19321272 has 48 divisors (see below), whose sum is σ = 52765440. Its totient is φ = 6386688.

The previous prime is 19321249. The next prime is 19321273. The reversal of 19321272 is 27212391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19321273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8088 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (1099280).

Almost surely, 2^19321272 is an apocalyptic number.

19321272 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 19321272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26382720).

19321272 is an abundant number, since it is smaller than the sum of its proper divisors (33444168).

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

19321272 is a wasteful number, since it uses less digits than its factorization.

19321272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252 (or 2245 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 19321272 is about 4395.5968877958. The cubic root of 19321272 is about 268.3357713173.

The spelling of 19321272 in words is "nineteen million, three hundred twenty-one thousand, two hundred seventy-two".