19231340 has 12 divisors (see below), whose sum is σ = 40385856. Its totient is φ = 7692528.

The previous prime is 19231327. The next prime is 19231343. The reversal of 19231340 is 4313291.

It is not an unprimeable number, because it can be changed into a prime (19231343) 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, 480764 + ... + 480803.

It is an arithmetic number, because the mean of its divisors is an integer number (3365488).

Almost surely, 2^19231340 is an apocalyptic number.

19231340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19231340 is an abundant number, since it is smaller than the sum of its proper divisors (21154516).

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

19231340 is a wasteful number, since it uses less digits than its factorization.

19231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961576 (or 961574 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 19231340 is about 4385.3551737573. The cubic root of 19231340 is about 267.9187954761.

The spelling of 19231340 in words is "nineteen million, two hundred thirty-one thousand, three hundred forty".