19926984 has 128 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 5030400.

The previous prime is 19926983. The next prime is 19926989. The reversal of 19926984 is 48962991.

It is not an unprimeable number, because it can be changed into a prime (19926983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75637 + ... + 75899.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^19926984 is an apocalyptic number.

19926984 is a gapful number since it is divisible by the number (14) 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 19926984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31933440).

19926984 is an abundant number, since it is smaller than the sum of its proper divisors (43939896).

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

19926984 is a wasteful number, since it uses less digits than its factorization.

19926984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 327 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 19926984 is about 4463.9650536267. The cubic root of 19926984 is about 271.1110323290. Note that the first 3 decimals are identical.

It can be divided in two parts, 19926 and 984, that multiplied together give a square (19607184 = 4428²).

The spelling of 19926984 in words is "nineteen million, nine hundred twenty-six thousand, nine hundred eighty-four".