19864068 has 24 divisors (see below), whose sum is σ = 52971072. Its totient is φ = 5675424.

The previous prime is 19864067. The next prime is 19864069. The reversal of 19864068 is 86046891.

It is an interprime number because it is at equal distance from previous prime (19864067) and next prime (19864069).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (19864067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118155 + ... + 118322.

It is an arithmetic number, because the mean of its divisors is an integer number (2207128).

Almost surely, 2^19864068 is an apocalyptic number.

It is an amenable number.

19864068 is an abundant number, since it is smaller than the sum of its proper divisors (33107004).

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

19864068 is a wasteful number, since it uses less digits than its factorization.

19864068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236491 (or 236489 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 19864068 is about 4456.9123841512. The cubic root of 19864068 is about 270.8254028026.

The spelling of 19864068 in words is "nineteen million, eight hundred sixty-four thousand, sixty-eight".