19995408 has 60 divisors (see below), whose sum is σ = 56329728. Its totient is φ = 6621120.

The previous prime is 19995401. The next prime is 19995419. The reversal of 19995408 is 80459991.

19995408 is a `hidden beast` number, since 19 + 99 + 540 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (19995401) 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, 27141 + ... + 27867.

Almost surely, 2^19995408 is an apocalyptic number.

19995408 is a gapful number since it is divisible by the number (18) 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 19995408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28164864).

19995408 is an abundant number, since it is smaller than the sum of its proper divisors (36334320).

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

19995408 is a wasteful number, since it uses less digits than its factorization.

19995408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 19995408 is about 4471.6225243193. The cubic root of 19995408 is about 271.4209857265.

The spelling of 19995408 in words is "nineteen million, nine hundred ninety-five thousand, four hundred eight".