19864368 has 30 divisors (see below), whose sum is σ = 55593044. Its totient is φ = 6621408.

The previous prime is 19864363. The next prime is 19864373. The reversal of 19864368 is 86346891.

It is an interprime number because it is at equal distance from previous prime (19864363) and next prime (19864373).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19864363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68830 + ... + 69117.

Almost surely, 2^19864368 is an apocalyptic number.

19864368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19864368 is an abundant number, since it is smaller than the sum of its proper divisors (35728676).

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

19864368 is a wasteful number, since it uses less digits than its factorization.

19864368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137961 (or 137952 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 19864368 is about 4456.9460396105. The cubic root of 19864368 is about 270.8267661892.

The spelling of 19864368 in words is "nineteen million, eight hundred sixty-four thousand, three hundred sixty-eight".