19463994 has 48 divisors (see below), whose sum is σ = 46332000. Its totient is φ = 5856480.

The previous prime is 19463989. The next prime is 19464007. The reversal of 19463994 is 49936491.

19463994 is a `hidden beast` number, since 1 + 9 + 4 + 639 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38757 + ... + 39255.

It is an arithmetic number, because the mean of its divisors is an integer number (965250).

Almost surely, 2^19463994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19463994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23166000).

19463994 is an abundant number, since it is smaller than the sum of its proper divisors (26868006).

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

19463994 is a wasteful number, since it uses less digits than its factorization.

19463994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 712 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 19463994 is about 4411.8016727863. The cubic root of 19463994 is about 268.9948636176.

The spelling of 19463994 in words is "nineteen million, four hundred sixty-three thousand, nine hundred ninety-four".