19914664 has 48 divisors (see below), whose sum is σ = 46922400. Its totient is φ = 7756320.

The previous prime is 19914659. The next prime is 19914691. The reversal of 19914664 is 46641991.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5307 + ... + 8245.

It is an arithmetic number, because the mean of its divisors is an integer number (977550).

Almost surely, 2^19914664 is an apocalyptic number.

19914664 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 19914664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23461200).

19914664 is an abundant number, since it is smaller than the sum of its proper divisors (27007736).

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

19914664 is a wasteful number, since it uses less digits than its factorization.

19914664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2974 (or 2959 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 19914664 is about 4462.5849011531. The cubic root of 19914664 is about 271.0551487007.

The spelling of 19914664 in words is "nineteen million, nine hundred fourteen thousand, six hundred sixty-four".