19344816 has 30 divisors (see below), whose sum is σ = 54139020. Its totient is φ = 6448224.

The previous prime is 19344799. The next prime is 19344839. The reversal of 19344816 is 61844391.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67026 + ... + 67313.

It is an arithmetic number, because the mean of its divisors is an integer number (1804634).

Almost surely, 2^19344816 is an apocalyptic number.

19344816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19344816 is an abundant number, since it is smaller than the sum of its proper divisors (34794204).

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

19344816 is a wasteful number, since it uses less digits than its factorization.

19344816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134353 (or 134344 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 19344816 is about 4398.2742070044. The cubic root of 19344816 is about 268.4447208900. Note that the first 3 decimals are identical.

The spelling of 19344816 in words is "nineteen million, three hundred forty-four thousand, eight hundred sixteen".