19668460 has 48 divisors (see below), whose sum is σ = 48492864. Its totient is φ = 6559488.

The previous prime is 19668457. The next prime is 19668487. The reversal of 19668460 is 6486691.

19668460 = T₂₂₆ + T₂₂₇ + ... + T₅₀₅.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3282 + ... + 7078.

It is an arithmetic number, because the mean of its divisors is an integer number (1010268).

Almost surely, 2^19668460 is an apocalyptic number.

19668460 is a gapful number since it is divisible by the number (10) 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 19668460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24246432).

19668460 is an abundant number, since it is smaller than the sum of its proper divisors (28824404).

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

19668460 is a wasteful number, since it uses less digits than its factorization.

19668460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850 (or 3848 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 19668460 is about 4434.9137533891. The cubic root of 19668460 is about 269.9334998549.

The spelling of 19668460 in words is "nineteen million, six hundred sixty-eight thousand, four hundred sixty".