19930208 has 24 divisors (see below), whose sum is σ = 39497472. Its totient is φ = 9899136.

The previous prime is 19930201. The next prime is 19930217. The reversal of 19930208 is 80203991.

It is a super-3 number, since 3×19930208³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19930201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3041 + ... + 7007.

It is an arithmetic number, because the mean of its divisors is an integer number (1645728).

Almost surely, 2^19930208 is an apocalyptic number.

It is an amenable number.

19930208 is a deficient number, since it is larger than the sum of its proper divisors (19567264).

19930208 is a wasteful number, since it uses less digits than its factorization.

19930208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19930208 is about 4464.3261529597. The cubic root of 19930208 is about 271.1256526187.

The spelling of 19930208 in words is "nineteen million, nine hundred thirty thousand, two hundred eight".