19316940 has 24 divisors (see below), whose sum is σ = 54087600. Its totient is φ = 5151168.

The previous prime is 19316911. The next prime is 19316959. The reversal of 19316940 is 4961391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160915 + ... + 161034.

It is an arithmetic number, because the mean of its divisors is an integer number (2253650).

Almost surely, 2^19316940 is an apocalyptic number.

19316940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19316940 is an abundant number, since it is smaller than the sum of its proper divisors (34770660).

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

19316940 is a wasteful number, since it uses less digits than its factorization.

19316940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321961 (or 321959 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 19316940 is about 4395.1040943304. The cubic root of 19316940 is about 268.3157154009.

The spelling of 19316940 in words is "nineteen million, three hundred sixteen thousand, nine hundred forty".