19664030 has 16 divisors (see below), whose sum is σ = 36616320. Its totient is φ = 7594272.

The previous prime is 19664009. The next prime is 19664063. The reversal of 19664030 is 3046691.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 19663984 and 19664002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33614 + ... + 34193.

It is an arithmetic number, because the mean of its divisors is an integer number (2288520).

Almost surely, 2^19664030 is an apocalyptic number.

19664030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19664030 is a deficient number, since it is larger than the sum of its proper divisors (16952290).

19664030 is a wasteful number, since it uses less digits than its factorization.

19664030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67843.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 19664030 is about 4434.4142792482. The cubic root of 19664030 is about 269.9132322929.

The spelling of 19664030 in words is "nineteen million, six hundred sixty-four thousand, thirty".