19975872 has 112 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 5609472.

The previous prime is 19975871. The next prime is 19975913. The reversal of 19975872 is 27857991.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19975871) 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, 119533 + ... + 119699.

It is an arithmetic number, because the mean of its divisors is an integer number (548640).

Almost surely, 2^19975872 is an apocalyptic number.

19975872 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 19975872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30723840).

19975872 is an abundant number, since it is smaller than the sum of its proper divisors (41471808).

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

19975872 is a wasteful number, since it uses less digits than its factorization.

19975872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 268 counting only the distinct ones).

The product of its digits is 317520, while the sum is 48.

The square root of 19975872 is about 4469.4375485065. The cubic root of 19975872 is about 271.3325619544.

The spelling of 19975872 in words is "nineteen million, nine hundred seventy-five thousand, eight hundred seventy-two".